# Toolcroft
> Toolcroft is a free directory of browser-only calculators, converters, generators, and file tools. Inputs never leave the device; there is no account and no upload. CI fails the build if a tool makes an unexpected network request.
> Site: https://toolcroft.com
> Catalog JSON: https://toolcroft.com/tools.json

## Money & Finance
### Financial Calculators
- [401(k) Retirement Savings Calculator](https://toolcroft.com/401k-calculator/): Project your 401(k) balance at retirement. Model employee contributions, employer match, IRS catch-up limits, salary growth, and compound returns year by year.
- [Annuity Payout Calculator](https://toolcroft.com/annuity-calculator/): Find the present value of an annuity or the payment required to satisfy a present value.
- [APR to APY Converter - Annual Percentage Rate vs Yield](https://toolcroft.com/apr-apy-calculator/): Convert between APR (Annual Percentage Rate) and APY (Annual Percentage Yield) for any compounding frequency. Understand the true cost of loans and actual return on savings accounts.
- [Auto Loan Calculator](https://toolcroft.com/auto-loan-calculator/): Calculate your monthly car payment, total interest, and true cost of ownership, including down payment, trade-in value, and sales tax.
- [Black-Scholes Options Pricing Calculator](https://toolcroft.com/options-pricing-calculator/): Price European call and put options using the Black-Scholes-Merton model. Calculate delta, gamma, vega, theta, rho, and solve for implied volatility.
- [Bond Price & Yield-to-Maturity Calculator](https://toolcroft.com/bond-yield-calculator/): Calculate bond price from YTM, or solve yield-to-maturity from price. See current yield, Macaulay duration, modified duration, convexity, and a full cash-flow schedule.
- [Break-Even Calculator - Find Your Break-Even Point](https://toolcroft.com/break-even-calculator/): Calculate your break-even point in units and revenue. Enter fixed costs, variable costs, and selling price to see when your business becomes profitable.
- [Budget Planner - 50/30/20 Rule Calculator](https://toolcroft.com/budget-planner/): Plan your monthly budget using the 50/30/20 rule. Allocate after-tax income to needs, wants, and savings, and track actual spending against targets in real time.
- [CAGR Calculator - Compound Annual Growth Rate](https://toolcroft.com/cagr-calculator/): Calculate the Compound Annual Growth Rate (CAGR) for any investment. Enter a start value, end value, and number of years to get the annualised growth rate, total return, and year-by-year growth table.
- [Capital Gains Tax Estimator](https://toolcroft.com/capital-gains-calculator/): Estimate federal capital gains tax on investment sales based on 2024 IRS brackets.
- [Cash / Till Counter](https://toolcroft.com/cash-counter/): Count cash by entering the number of each bill and coin denomination to get an instant total.
- [CD Ladder Calculator - Certificate of Deposit Ladder Strategy](https://toolcroft.com/cd-ladder-calculator/): Build a CD ladder by splitting your savings across multiple CDs with staggered maturity dates. See total interest earned and maturity values for each rung.
- [College / 529 Education Savings Plan Calculator](https://toolcroft.com/college-savings-calculator/): Plan for college costs with this 529 savings calculator. Projects future tuition costs with inflation, estimates your savings growth, and shows the monthly contribution needed to reach your goal.
- [Compound Interest Calculator - Future Value with Contributions](https://toolcroft.com/compound-interest-calculator/): Calculate compound interest and future value of an investment with optional monthly contributions. Choose compounding frequency and see a year-by-year breakdown. Free, private, runs in your browser.
- [Cost-of-Living Comparison - Compare U.S. Metro Costs](https://toolcroft.com/cost-of-living-comparison/): Compare 2024 BEA price parities for 45 U.S. metro areas across all items, goods, housing rents, utilities, and other services; estimate salary equivalents.
- [Credit Card Payoff Calculator](https://toolcroft.com/credit-card-payoff-calculator/): Calculate how long it will take to pay off a credit card balance and how much interest you will pay.
- [Crypto P&L Calculator - Profit & Loss](https://toolcroft.com/crypto-pnl-calculator/): Calculate cryptocurrency profit or loss using FIFO, LIFO, or average cost basis. Add multiple purchase lots, set a sell price and exchange fee, and see your total gain/loss and break-even price.
- [Debt Payoff Calculator - Avalanche & Snowball Strategies](https://toolcroft.com/debt-payoff-calculator/): Calculate how long it will take to pay off your debts using the avalanche or snowball method. Compare strategies and see how extra payments save you money.
- [Discount Calculator](https://toolcroft.com/discount-calculator/): Calculate discounted price, savings amount, and discount percentage. Enter original price and discount %, or original and final price to find the discount.
- [Dollar-Cost Averaging Calculator - DCA Investment Simulator](https://toolcroft.com/dca-calculator/): Simulate dollar-cost averaging: invest a fixed amount on a recurring schedule and see your projected portfolio value over time. Compare DCA against a lump-sum investment.
- [Electricity Bill Calculator - Estimate Your Monthly Power Cost](https://toolcroft.com/electricity-bill-calculator/): Calculate your monthly electricity bill by entering your appliances, wattage, usage hours, and cost per kWh. Add multiple devices and see itemized kWh and cost breakdowns.
- [Emergency Fund Calculator - How Long to Save Your Cushion](https://toolcroft.com/emergency-fund-calculator/): Find out how much you need in an emergency fund and how long it will take to save it based on your monthly expenses, savings rate, and interest earned.
- [Estate Value Calculator - Net Worth & Estate Planning](https://toolcroft.com/estate-calculator/): Estimate the total value of an estate by listing assets and liabilities. Categorizes real estate, retirement accounts, investments, and personal property to show gross estate and net worth.
- [FIRE Number Calculator - Financial Independence Retire Early](https://toolcroft.com/fire-calculator/): Calculate your FIRE number (the savings needed to retire) and how many years until you reach financial independence. Uses the 4% safe withdrawal rule with adjustable parameters.
- [Future Value Calculator](https://toolcroft.com/future-value-calculator/): Calculate the future value of a lump sum or annuity with compound interest.
- [Gross-Up Calculator - Net to Gross Pay Calculator](https://toolcroft.com/gross-up-calculator/): Calculate the gross pay needed to deliver a specific net (take-home) amount after taxes. Also converts gross pay to net. Useful for bonuses, reimbursements, and contractor payments.
- [Hourly to Salary Calculator - Pay Rate Converter](https://toolcroft.com/hourly-to-salary-calculator/): Convert between hourly wage and annual salary instantly. See daily, weekly, bi-weekly, semi-monthly, monthly, quarterly, and yearly pay for any rate.
- [HSA / FSA Contribution Calculator](https://toolcroft.com/hsa-calculator/): Calculate your HSA or FSA tax savings, contribution limits, and projected investment growth.
- [Inflation Calculator - Historical CPI Purchasing Power](https://toolcroft.com/inflation-calculator/): Calculate the purchasing power of money over time using historical US CPI-U data from 1913 to 2024. See how inflation has eroded the value of a dollar across decades.
- [Investment Fee Calculator - See the True Cost of Fund Fees](https://toolcroft.com/investment-fee-calculator/): Compare two fee scenarios to see how expense ratios and management fees drain your investment portfolio over time. Visualize the compounding drag of fees over decades.
- [Lakh / Crore to Million / Billion Converter](https://toolcroft.com/lakh-crore-converter/): Convert between the South Asian number system (lakhs, crores) and the Western system (millions, billions). Instantly convert any amount in either direction.
- [Lease vs. Buy Car Calculator](https://toolcroft.com/lease-vs-buy-calculator/): Compare the total cost of leasing vs. financing a vehicle. Enter money factor, residual value, APR, and hold period to see monthly payments and total out-of-pocket costs.
- [Loan Amortization Schedule Calculator - Full Payment Table](https://toolcroft.com/amortization-schedule/): Generate a full loan amortization schedule for any mortgage, car loan, or personal loan. See every monthly payment broken down into principal and interest, plus total cost and interest paid.
- [Loan Calculator](https://toolcroft.com/loan-calculator/): Calculate monthly payment, total interest, and total cost for any fixed-rate loan. Enter loan amount, rate, and term. Results update instantly.
- [Loan Comparison Calculator - Compare Loans Side by Side](https://toolcroft.com/loan-comparison-calculator/): Compare two loan options side by side. See monthly payment, total interest, and total cost for each loan to find the better deal.
- [Mortgage Calculator - Monthly Payment & Amortization Schedule](https://toolcroft.com/mortgage-calculator/): Calculate your monthly mortgage payment including principal, interest, property tax, home insurance, PMI, and HOA. View the full amortization schedule. Free, private, runs in your browser.
- [Mortgage Points Break-Even Calculator](https://toolcroft.com/mortgage-points-calculator/): Calculate whether buying mortgage discount points is worth it. Enter your loan amount, interest rates, and points cost to see your monthly savings, break-even month, and total lifetime savings.
- [Net Worth Calculator - Track Assets & Liabilities](https://toolcroft.com/net-worth-calculator/): Calculate your net worth by entering your assets and liabilities. Track your progress over time with snapshots stored locally in your browser.
- [NPV & IRR Calculator - Net Present Value & Internal Rate of Return](https://toolcroft.com/npv-irr-calculator/): Calculate the Net Present Value (NPV) and Internal Rate of Return (IRR) of any cash-flow series. Includes payback period, sensitivity analysis, and sample presets.
- [P/E Ratio & Graham Number Intrinsic Value Calculator](https://toolcroft.com/pe-ratio-calculator/): Calculate the P/E ratio, P/B ratio, earnings yield, Graham Number intrinsic value, PEG ratio, and margin of safety for any stock. Based on Benjamin Graham's value investing formulas.
- [Paycheck Calculator - Estimate Your Take-Home Pay 2026](https://toolcroft.com/paycheck-calculator/): Estimate take-home pay from salary or hourly wages, covering federal, Social Security, Medicare, and state tax withholding. Free, private, browser-only.
- [Position Size Calculator - Stock & Forex](https://toolcroft.com/position-size-calculator/): Calculate how many shares or units to buy based on your account size, entry price, stop-loss, and risk tolerance. Supports percent-risk, fixed-dollar, and Kelly Criterion methods.
- [Present Value Calculator](https://toolcroft.com/present-value-calculator/): Calculate the present value of a future lump sum or annuity using discounted cash flow.
- [Profit Margin Calculator](https://toolcroft.com/profit-margin-calculator/): Calculate gross profit margin, markup percentage, and operating margin from cost and revenue. Instant results.
- [Refinance Calculator - Break-Even & Savings](https://toolcroft.com/refinance-calculator/): Find out whether refinancing your mortgage makes sense. Compare monthly savings, break-even month, and net savings over your planned hold period.
- [Rent Affordability Calculator - 30% Rule & 50/30/20 Budget](https://toolcroft.com/rent-affordability-calculator/): Find your maximum affordable rent using the 30% rule and 50/30/20 budget framework. Enter your gross annual income to see how much rent you can afford.
- [Rent vs. Buy Calculator](https://toolcroft.com/rent-vs-buy-calculator/): Compare the long-term cost of renting vs. buying a home. Model appreciation, opportunity cost, taxes, maintenance, and rent inflation to find your crossover year.
- [Required Minimum Distribution (RMD) Calculator](https://toolcroft.com/rmd-calculator/): Calculate your IRS Required Minimum Distribution from a traditional IRA or 401(k). See a year-by-year withdrawal schedule using the official Uniform Lifetime Table.
- [Retirement Calculator](https://toolcroft.com/retirement-calculator/): Project your retirement nest egg, see how many years your savings will last, and check if you're on track. Enter age, savings, contributions, and return assumptions.
- [ROI Calculator](https://toolcroft.com/roi-calculator/): Calculate return on investment (ROI), net gain, and annualized CAGR for any investment. Enter initial amount, final value, and optional holding period.
- [Roth vs. Traditional IRA Calculator](https://toolcroft.com/roth-vs-traditional-calculator/): Compare Roth and Traditional IRA outcomes side by side. See which account leaves you with more after-tax money at retirement based on your current and expected future tax rates.
- [Salary Comparison by City - Cost of Living Adjusted](https://toolcroft.com/salary-comparison/): Compare job offers and salaries across cities after adjusting for cost of living. Uses a cost of living index to show which salary has the most real buying power.
- [Salary to Hourly Calculator](https://toolcroft.com/salary-to-hourly/): Convert between annual salary, monthly, biweekly, weekly, and hourly pay rates. Adjust hours per week and weeks worked per year.
- [Sales Commission Calculator](https://toolcroft.com/commission-calculator/): Calculate flat-rate or tiered sales commissions and effective commission rate.
- [Sales Tax Calculator - Add or Remove Tax Instantly](https://toolcroft.com/sales-tax-calculator/): Calculate sales tax by adding tax to a pre-tax price or removing tax from a total. Includes US state sales tax rate reference. Runs in your browser.
- [Savings Goal Calculator](https://toolcroft.com/savings-calculator/): Calculate how long it takes to reach a savings goal, or find out how much you need to save monthly. Enter your target, starting balance, and interest rate.
- [Self-Employment Tax Calculator (SE Tax 2024–2025)](https://toolcroft.com/self-employment-tax-calculator/): Calculate your US self-employment (SE) tax, covering Social Security and Medicare, plus estimated federal income tax. Includes the SE deduction, quarterly payment estimates, and Additional Medicare Tax.
- [Stock Cost-Basis / Averaging Calculator](https://toolcroft.com/stock-average-calculator/): Calculate the average cost basis across multiple stock purchases and see your current gain or loss.
- [Stock Split Calculator](https://toolcroft.com/stock-split-calculator/): Calculate new share count and price after a stock split or reverse split.
- [Subscription Cost Analyzer - Monthly & Annual True Cost](https://toolcroft.com/subscription-analyzer/): Track all your subscriptions and see the true monthly and annual total. Add Netflix, Spotify, gym, cloud storage and more. Shows cost per day, per category, and total annual spend.
- [Tip Calculator](https://toolcroft.com/tip-calculator/): Calculate tip, total, and per-person split from a bill amount.
- [Unit Price Calculator - Compare Price Per Unit](https://toolcroft.com/unit-price-calculator/): Compare the price per unit of up to 6 products side by side. Enter a price and quantity for each item to instantly see which option gives the best value for money.
- [US Tax Bracket Estimator - 2024 Federal Income Tax Calculator](https://toolcroft.com/tax-bracket-estimator/): Estimate your 2024 US federal income tax using official IRS brackets. See your marginal rate, effective rate, and a full bracket breakdown. Free, instant, no sign-up.
- [Zakat Calculator - Calculate Your Annual Zakat Obligation](https://toolcroft.com/zakat-calculator/): Calculate your annual Zakat obligation. Enter your zakatable assets, liabilities, and current gold/silver prices. Automatically checks the nisab threshold and computes the 2.5% due.

## Everyday Life
### Health & Fitness
- [A1C ↔ Blood Glucose Converter](https://toolcroft.com/a1c-calculator/): Convert A1C in NGSP percent or IFCC mmol/mol to estimated average glucose (eAG) in mg/dL or mmol/L, with reference ranges and context.
- [Baby Formula & Infant Feeding Amount Calculator](https://toolcroft.com/baby-formula-calculator/): Calculate how much formula to feed your baby based on age and weight using standard pediatric guidelines (150 ml/kg/day). Covers newborn to 12 months.
- [BAC Calculator - Blood Alcohol Content Estimator](https://toolcroft.com/bac-calculator/): Estimate your blood alcohol content (BAC) using the Widmark formula. Enter drinks, weight, sex, and hours drinking for an instant BAC estimate.
- [Biological Age Estimator - Lifestyle-Based Age Calculator](https://toolcroft.com/biological-age-estimator/): Estimate your biological age based on lifestyle factors including BMI, blood pressure, exercise, sleep, diet, smoking status, and alcohol intake. See how your habits add or subtract years.
- [Blood Pressure Category Checker - AHA/ACC Guidelines](https://toolcroft.com/blood-pressure-checker/): Enter your systolic and diastolic blood pressure to see your AHA/ACC category: Normal, Elevated, Stage 1 or Stage 2 Hypertension, or Hypertensive Crisis.
- [BMI Calculator](https://toolcroft.com/bmi-calculator/): Calculate Body Mass Index in metric or imperial. WHO classification and healthy weight range.
- [BMR / TDEE Calculator](https://toolcroft.com/bmr-calculator/): Calculate your Basal Metabolic Rate and Total Daily Energy Expenditure using Mifflin-St Jeor or Harris-Benedict.
- [Body Fat Percentage Calculator](https://toolcroft.com/body-fat-calculator/): Calculate your body fat percentage using the US Navy circumference method. Supports metric and imperial, shows ACE classification and lean body mass. Free and private.
- [Body Frame Size Calculator - Small, Medium, or Large Frame?](https://toolcroft.com/body-frame-calculator/): Determine your body frame size (small, medium, or large) using the wrist circumference method. See your frame-adjusted ideal weight range.
- [Box Breathing / Breathing Exercise Guide](https://toolcroft.com/breathing-exercise/): Guided breathing exercises with animated circle. Choose from box breathing, 4-7-8, resonance, and more. Reduce stress and improve focus.
- [Calorie Burn Calculator - Calories Burned by Activity](https://toolcroft.com/calorie-burn-calculator/): Calculate how many calories you burn during exercise or daily activities. Enter your weight, activity type, and duration to get an instant estimate based on MET values.
- [Calorie Tracker - Daily Food Log & Calorie Counter](https://toolcroft.com/calorie-tracker/): Track your daily calorie intake with a simple food log. Set a daily calorie goal, add meals and snacks, and see how much you have left for the day.
- [Child Growth Percentile Calculator (WHO/CDC)](https://toolcroft.com/growth-percentile-calculator/): Calculate your child's weight and height percentile based on WHO/CDC reference data for ages 0-18 years. See where your child falls compared to the reference population.
- [Cycling FTP Training Zones Calculator](https://toolcroft.com/ftp-zones-calculator/): Calculate your 7 cycling training zones from your Functional Threshold Power (FTP). Enter your FTP or estimate it from a 20-minute test to get power ranges for each zone.
- [Cycling Power / Speed Calculator](https://toolcroft.com/cycling-power-calculator/): Calculate cycling power output (watts), speed, distance, or time using a physics-based model. Includes FTP power zones.
- [Daily Water Intake Calculator - How Much Water Should You Drink?](https://toolcroft.com/water-intake-calculator/): Calculate your personalized daily water intake based on body weight, activity level, and climate. Get recommendations in liters, cups, and ounces.
- [Glycemic Load Calculator - GL & GI for Any Food](https://toolcroft.com/glycemic-load-calculator/): Calculate the Glycemic Load (GL) of any food using its Glycemic Index (GI), carbohydrate content, and fiber. Includes a reference table of common foods.
- [Habit Tracker - Daily Habit Tracker with Streak Counter](https://toolcroft.com/habit-tracker/): Track daily habits with a visual grid, streak counter, and localStorage persistence. Add habits, mark completions, and watch your streaks grow. No account required.
- [Heart Rate Zone Calculator](https://toolcroft.com/heart-rate-zones/): Calculate your 5 training heart rate zones (Z1–Z5) from your age and resting heart rate. Supports Classic, Tanaka, and Karvonen methods. Free and private.
- [Heat Index Calculator - Real-Feel Temperature & Safety](https://toolcroft.com/heat-index-calculator/): Calculate the heat index (feels-like temperature) using the NWS Rothfusz equation. Enter temperature and relative humidity to get the apparent temperature and heat safety warnings.
- [Ideal Weight Calculator - Devine, Robinson, Miller & Hamwi Formulas](https://toolcroft.com/ideal-weight-calculator/): Calculate your ideal body weight using four evidence-based formulas (Devine, Robinson, Miller, Hamwi) plus a BMI-based healthy weight range.
- [Intermittent Fasting Timer - 16:8, 18:6, OMAD Schedules](https://toolcroft.com/fasting-timer/): Plan your intermittent fasting schedule with a visual countdown timer. Supports 16:8, 18:6, 20:4, and OMAD protocols. Set your fast start time and track your eating window.
- [Lean Body Mass Calculator - Boer, James & Hume Formulas](https://toolcroft.com/lean-body-mass-calculator/): Calculate lean body mass (LBM) using the Boer, James, and Hume formulas from weight and height. Includes fat-free mass estimate for male and female.
- [Macro Calculator](https://toolcroft.com/macro-calculator/): Calculate daily protein, carbs, and fat grams from your calorie target using common macro splits.
- [One-Rep Max Calculator](https://toolcroft.com/one-rep-max-calculator/): Estimate your one-rep max (1RM) from any weight and rep count using five formulas (Epley, Brzycki, Lombardi, O'Conner, Wathan). Includes a rep-weight table. Free and private.
- [Ovulation Calculator - Predict Your Fertile Window](https://toolcroft.com/ovulation-calculator/): Predict your ovulation date and fertile window based on your last period and cycle length. See up to 6 cycles at once. Free, private, no sign-up.
- [Pace Calculator](https://toolcroft.com/pace-calculator/): Calculate running pace, finish time, or distance. Enter any two values and get the third, plus split times for 5K, 10K, half marathon, and marathon. Free and private.
- [Period & Cycle Tracker - Predict Next Period & Fertile Window](https://toolcroft.com/period-tracker/): Track your menstrual cycle, predict your next period, ovulation date, and fertile window. All data stays in your browser.
- [Pet Age Calculator - Dog & Cat Years to Human Years](https://toolcroft.com/pet-age-calculator/): Convert your dog or cat's age to the equivalent human years. Accounts for breed size (small, medium, large, giant dogs) and follows AKC / AAFP age conversion guidelines.
- [Pet Food Calculator: Daily Portions for Dogs & Cats](https://toolcroft.com/pet-food-calculator/): Calculate how much to feed your dog or cat each day based on weight, activity level, and life stage. Uses the standard veterinary RER/MER energy formula.
- [Pregnancy Due Date Calculator](https://toolcroft.com/pregnancy-due-date/): Calculate your estimated due date from your last period, conception date, ultrasound, or IVF transfer. Shows gestational age, trimester, and key milestones. Free and private.
- [Pregnancy Weight Gain Calculator (IOM Guidelines)](https://toolcroft.com/pregnancy-weight-gain-calculator/): Calculate recommended pregnancy weight gain based on pre-pregnancy BMI using IOM (Institute of Medicine) 2009 guidelines. Track whether you are on track each trimester.
- [Race Time Predictor - Predict Finish Times Using Riegel's Formula](https://toolcroft.com/race-time-predictor/): Predict your finish time for any race distance based on a known race result. Uses Riegel's formula for 5K, 10K, half marathon, marathon, and more.
- [Running Cadence & Stride Length Calculator](https://toolcroft.com/running-cadence-calculator/): Calculate your running stride length from cadence (steps per minute) and pace, or find the cadence needed for a target stride length. Improve running efficiency.
- [Sleep Cycle Calculator - Estimate Bedtime and Wake-Up Times](https://toolcroft.com/sleep-cycle-calculator/): Plan bedtimes or wake times with adjustable 70–120 minute cycle estimates, a fall-asleep buffer, and separate sleep and time-in-bed durations.
- [Sleep Quality Journal & Pattern Logger](https://toolcroft.com/sleep-tracker/): Log your bedtime, wake time, and sleep quality each day. Track average sleep duration and quality trends over time. All data is stored locally in your browser.
- [SPF Sunscreen Calculator - Burn Time & Protection Duration](https://toolcroft.com/spf-calculator/): Calculate how long sunscreen protects your skin based on your Fitzpatrick skin type, SPF rating, and UV index. See how much sunscreen to apply and when to reapply.
- [Standard Drinks & Alcohol Units Calculator (UK & US)](https://toolcroft.com/alcohol-units-calculator/): Calculate UK alcohol units and US standard drinks for any drink. Enter volume and ABV, or pick from common drink presets. Includes low-risk drinking guidelines.
- [Steps to Distance Calculator: Convert Steps to Miles or Km](https://toolcroft.com/steps-to-distance/): Estimate distance from steps or steps from distance using a height-based or measured step length. Results are approximate, not GPS measurements.
- [Sweat Rate & Hydration Calculator for Athletes](https://toolcroft.com/sweat-rate-calculator/): Calculate your personal sweat rate and post-exercise rehydration target. Weigh yourself before and after a workout to get a precise fluid replacement plan.
- [Swim Pace Calculator](https://toolcroft.com/swim-pace-calculator/): Calculate swim pace per 100m or 100y, total time, distance, lengths, and speed. Choose a pool course or open water; results are calculated in your browser.
- [Treadmill Pace Converter - Speed to Pace, mph to km/h](https://toolcroft.com/treadmill-pace-converter/): Convert treadmill speed (km/h or mph) to running pace (min/km or min/mile) and back. Includes incline grade-adjusted pace calculation.
- [UV Index Calculator - Burn Time, Vitamin D & SPF Guide](https://toolcroft.com/uv-calculator/): Enter the UV index and your Fitzpatrick skin type to calculate safe sun exposure time, vitamin D production time, and the recommended SPF sunscreen rating.
- [VO2 Max Calculator - Estimate Aerobic Fitness](https://toolcroft.com/vo2-max-calculator/): Estimate your VO₂ max from the Cooper 12-minute run, 1.5-mile run, or Rockport 1-mile walk test. Includes ACSM fitness category rating.
- [Waist-to-Height Ratio Calculator - Cardiovascular Risk](https://toolcroft.com/waist-height-ratio/): Calculate your waist-to-height ratio (WHtR) to assess cardiovascular and metabolic health risk. Research shows WHtR may be a better predictor of health risk than BMI alone.
- [Waist-to-Hip Ratio Calculator - WHR Health Risk](https://toolcroft.com/waist-hip-ratio-calculator/): Calculate your waist-to-hip ratio (WHR) and see your cardiovascular health risk category (low, moderate, high) according to WHO guidelines. Supports inches and centimetres.
- [Wilks Score Calculator - Powerlifting Strength Comparison](https://toolcroft.com/wilks-score-calculator/): Calculate your Wilks score to compare powerlifting strength across different body weights. Enter body weight and total (squat + bench + deadlift).
- [Wind Chill Calculator - Feels-Like Temperature & Frostbite Risk](https://toolcroft.com/wind-chill-calculator/): Calculate the wind chill temperature using the NWS formula. Enter air temperature and wind speed to get the feels-like temperature, frostbite risk time, and safety recommendations.
- [Workout Volume Calculator - Session Tonnage & Estimated 1RM](https://toolcroft.com/workout-volume-calculator/): Track set-by-set workout tonnage, compare each exercise’s share, project repeated sessions across a week, and estimate one-rep max values.

### Date & Time
- [Add or Subtract Days from a Date](https://toolcroft.com/date-add-subtract/): Add or subtract days, weeks, months, years, hours, or minutes from any date and see the resulting date instantly.
- [Age Calculator](https://toolcroft.com/age-calculator/): Calculate your exact age in years, months, and days. See total days, weeks, hours, next birthday countdown, zodiac sign, and day of week you were born.
- [Birthday Countdown - Days Until Your Next Birthday](https://toolcroft.com/birthday-countdown/): Count the days until your next birthday, see your next age and weekday, and follow a live countdown to local midnight. Free and browser-based.
- [Chinese Zodiac Calculator - Find Your Animal Sign & Element](https://toolcroft.com/chinese-zodiac-calculator/): Find your Chinese zodiac animal sign, element, and Yin/Yang energy from your birth year. Includes personality traits, lucky colors, lucky numbers, and compatible signs.
- [Countdown Timer - Free Online Countdown to Any Date](https://toolcroft.com/countdown-timer/): Count down to any future event: a New Year, vacation, product launch, or deadline. Live days, hours, minutes, and seconds. Save multiple countdowns and share via link. Runs in your browser.
- [Day of the Week Calculator - What Day Was Any Date?](https://toolcroft.com/day-of-week-calculator/): Find out what day of the week any date falls on. Shows the day name, week number, day of year, quarter, and more. Also find the next occurrence of any weekday.
- [Days Between Dates](https://toolcroft.com/date-difference-calculator/): Calculate the exact number of days, weeks, months, and years between two dates. Toggle weekdays-only and include/exclude the end date.
- [Days-Since / Sobriety Counter](https://toolcroft.com/days-since-counter/): Track how many days, weeks, months, and years have passed since any date. Perfect for sobriety, quit dates, and personal milestones.
- [Easter Date Calculator - Find Easter Sunday for Any Year](https://toolcroft.com/easter-calculator/): Calculate the date of Easter Sunday for any year using the Anonymous Gregorian (Butcher's) algorithm. Supports Gregorian and Julian calendar traditions.
- [Equinox & Solstice Date Calculator - Astronomical Seasons](https://toolcroft.com/equinox-calculator/): Calculate the precise dates and times of the March equinox, June solstice, September equinox, and December solstice for any year from 1000 to 3000, using Jean Meeus astronomical algorithms.
- [Fiscal Quarter & Period Calculator](https://toolcroft.com/fiscal-quarter-calculator/): Find the fiscal quarter, fiscal year, and days remaining for any date. Supports custom fiscal year start months (e.g. April for UK, October for US federal).
- [Free Online Stopwatch with Lap Timer (Hundredths of a Second)](https://toolcroft.com/stopwatch/): A free online stopwatch with centisecond timing, lap splits, best and worst lap highlighting, and CSV export. Start, pause, and reset in your browser.
- [Generation Finder - What Generation Am I?](https://toolcroft.com/generation-finder/): Enter your birth year to find out which generation you belong to - Gen Z, Millennial, Gen X, Baby Boomer, Silent Generation, or Gen Alpha - along with defining events and characteristics.
- [Golden Hour & Blue Hour Photography Calculator](https://toolcroft.com/golden-hour-calculator/): Calculate sunrise, sunset, golden hour, and blue hour times for any location and date. Perfect for photographers wanting to plan the perfect shot at the best natural light.
- [Great Circle / Haversine Distance Calculator](https://toolcroft.com/haversine-calculator/): Calculate the great-circle distance between two points on Earth using the Haversine formula. Returns distance in km and miles, initial bearing, and the geographic midpoint.
- [Hebrew Calendar Converter - Jewish Date to Gregorian](https://toolcroft.com/hebrew-calendar-converter/): Convert dates between the Hebrew (Jewish) calendar and the Gregorian calendar. Supports leap years with Adar I & II and all 12/13 Hebrew months.
- [Hijri Calendar Converter - Islamic Date to Gregorian](https://toolcroft.com/hijri-calendar-converter/): Convert dates between the Hijri (Islamic) calendar and the Gregorian calendar. Uses the tabular Islamic calendar algorithm. Works entirely offline in your browser.
- [Holiday Countdown - Days Until the Next Holiday](https://toolcroft.com/holiday-countdown/): Count the days until every major holiday. See upcoming holidays sorted by how soon they arrive, all calculated locally in your browser.
- [ICS Calendar Event Generator](https://toolcroft.com/ics-generator/): Create and download ICS (iCalendar) files for any event. Compatible with Google Calendar, Outlook, Apple Calendar, and any RFC 5545 calendar app.
- [ISO Week Number Calculator](https://toolcroft.com/week-number-calculator/): Find the ISO 8601 week number for any date. See the week year, day of the week, and the exact Monday-Sunday date range for the selected week.
- [Julian Date Converter - Gregorian to Julian Day Number](https://toolcroft.com/julian-date-converter/): Convert between Gregorian calendar dates and Julian Day Numbers (JDN / JD). Also shows the equivalent Julian calendar date and Modified Julian Date (MJD).
- [Leap Year & Days-in-Month Checker](https://toolcroft.com/leap-year-calculator/): Check if any year is a leap year, see the number of days in each month, find the next and previous leap years, and explore why 1900 was not a leap year.
- [Life Calendar - Weeks of Life Visualizer](https://toolcroft.com/life-calendar/): Visualize your life as a grid of weeks. Enter your birth date and life expectancy to see which weeks have passed and how many remain - inspired by the famous "Your Life in Weeks" concept.
- [Lunar Phase Calculator - Moon Phase for Any Date](https://toolcroft.com/lunar-phase-calculator/): Find the moon phase for any date. Shows the current lunar phase, illumination percentage, moon age, and the dates of the next new moon and full moon.
- [Multi-Timezone Meeting Planner](https://toolcroft.com/meeting-planner/): Plan meetings across multiple cities and timezones. Visual overlap grid shows working hours for every participant. Download .ics or share a link.
- [Pomodoro Timer - Free Online Focus Timer](https://toolcroft.com/pomodoro-timer/): Run focused work and breaks with a customizable Pomodoro timer. Presets, audio cues, optional notifications, and a daily session count, all in your browser.
- [Stargazing Planner - Planet Visibility Calculator](https://toolcroft.com/stargazing-planner/): Check when Mercury, Venus, Mars, Jupiter, and Saturn are visible in the sky. Uses simplified orbital mechanics to predict planet elongation and visibility.
- [Sunrise & Sunset Calculator - Sun Times for Any Location](https://toolcroft.com/sunrise-sunset-calculator/): Calculate sunrise, sunset, and solar noon for any latitude and longitude. Supports any UTC offset and detects polar day/night.
- [Tidal Prediction Calculator - Tidal Harmonic Model](https://toolcroft.com/tide-calculator/): Predict tidal heights using a simplified harmonic model based on the major lunar and solar tidal constituents. View a 48-hour tide curve and find high/low tide times.
- [Time Card Calculator - Track Work Hours & Overtime](https://toolcroft.com/time-card-calculator/): Calculate total work hours from clock-in and clock-out times. Add breaks, track overtime, and get a weekly summary. Supports overnight shifts.
- [Time Duration Calculator - Add, Subtract & Multiply Durations](https://toolcroft.com/time-duration-calculator/): Add, subtract, multiply, divide, or average a list of HH:MM:SS durations without calendar dates. Get results in HH:MM:SS, total seconds, minutes, and decimal hours.
- [Timezone Converter - Convert Time Between Time Zones](https://toolcroft.com/timezone-converter/): Convert any date and time between multiple time zones instantly. Shows UTC offset, DST status, and day/night indicator. Uses the full IANA timezone database. Runs in your browser.
- [Unix Timestamp Converter - Epoch Time to Date & Back](https://toolcroft.com/unix-timestamp-converter/): Convert Unix timestamps (epoch time) to human-readable dates and back. Auto-detects seconds vs milliseconds. Shows ISO 8601, RFC 2822, UTC, and local time. Live current timestamp for developers.
- [Wedding Anniversary Calculator - Gifts by Year](https://toolcroft.com/anniversary-calculator/): Enter your wedding date to find out how many years you have been married and discover the traditional and modern gift themes for each anniversary year.
- [Work Anniversary & Tenure Calculator](https://toolcroft.com/tenure-calculator/): Calculate how long you have worked at a job - in years, months, and days - and find out when your next work anniversary is.
- [Working Days Calculator](https://toolcroft.com/working-days-calculator/): Count the number of business days between two dates, excluding weekends and public holidays for the US, UK, or Canada.
- [World Clock - Live Time in Every Timezone](https://toolcroft.com/world-clock/): See the current time in multiple cities and timezones simultaneously. Live-updating clocks with date, UTC offset, and DST indicator. Add your own zones, saved automatically to your browser.
- [Zodiac Sign Calculator - Find Your Western Astrology Sign](https://toolcroft.com/zodiac-sign-calculator/): Find your Western zodiac (astrological) sign from your birth date. See personality traits, element, modality, ruling planet, and strengths and weaknesses.

### Unit Converters
- [Angle Converter - Degrees, Radians, Gradians & More](https://toolcroft.com/angle-converter/): Convert angles between degrees, radians, gradians, turns, arcminutes, and arcseconds instantly.
- [Area Converter](https://toolcroft.com/area-converter/): Convert between square meters, square feet, acres, hectares, square miles, and more.
- [Cooking Converter](https://toolcroft.com/cooking-converter/): Convert cooking measurements: teaspoons, tablespoons, cups, milliliters, and more.
- [Data Storage Converter](https://toolcroft.com/data-storage-converter/): Convert between bits, bytes, KB, MB, GB, TB, and IEC (KiB, MiB, GiB) units instantly.
- [Energy Converter](https://toolcroft.com/energy-converter/): Convert energy between Joules, kJ, calories, kcal, Wh, kWh, BTU, foot-pounds, and electronvolts.
- [Force Converter - Newtons, Pounds-force, Kilogram-force & More](https://toolcroft.com/force-converter/): Convert force units between Newtons, kilonewtons, meganewtons, pound-force, kilogram-force, dynes, and kips instantly.
- [Frequency Converter - Hz, kHz, MHz, GHz, RPM & More](https://toolcroft.com/frequency-converter/): Convert frequency units between Hertz, kilohertz, megahertz, gigahertz, terahertz, RPM, and revolutions per second.
- [Fuel Efficiency Converter - MPG, km/L, L/100km](https://toolcroft.com/fuel-efficiency-converter/): Convert fuel efficiency between US MPG, UK MPG, kilometres per litre (km/L), and litres per 100 km (L/100km).
- [Latitude/Longitude Format Converter - DD, DMS, DDM](https://toolcroft.com/lat-long-converter/): Convert GPS coordinates between Decimal Degrees (DD), Degrees Minutes Seconds (DMS), and Degrees Decimal Minutes (DDM). Runs entirely in your browser.
- [Length Unit Converter](https://toolcroft.com/length-converter/): Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, nautical miles, and more. Instant bidirectional conversion. All calculations happen locally.
- [Power Converter](https://toolcroft.com/power-converter/): Convert power between watts, kilowatts, megawatts, horsepower (mechanical, metric, electrical), and BTU/h.
- [Pressure Converter](https://toolcroft.com/pressure-converter/): Convert pressure between Pa, kPa, MPa, bar, atm, psi, mmHg, inHg, and Torr instantly.
- [Speed Converter](https://toolcroft.com/speed-converter/): Convert between mph, km/h, m/s, knots, and other speed units.
- [Temperature Converter](https://toolcroft.com/temperature-converter/): Convert between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Includes common reference temperatures and an explanation of each scale. All calculations happen locally.
- [Time Unit Converter](https://toolcroft.com/time-converter/): Convert time between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, months, years, decades, and centuries.
- [Torque Converter - N·m, ft·lbf, in·lbf & More](https://toolcroft.com/torque-converter/): Convert torque between Newton-metres, kilonewton-metres, foot-pounds, inch-pounds, inch-ounces, and kilogram-force metres.
- [Volume Converter](https://toolcroft.com/volume-converter/): Convert between milliliters, liters, gallons, cups, fluid ounces, and more.
- [Weight Unit Converter](https://toolcroft.com/weight-converter/): Convert between kilograms, pounds, ounces, stone, metric tons, troy ounces, carats, and more. Instant bidirectional conversion. All calculations happen locally.

### Cooking & Food
- [Air Fryer Conversion Calculator - Temp & Time from Oven Recipe](https://toolcroft.com/air-fryer-converter/): Convert conventional oven temperatures and cook times to air fryer settings. Reduces temperature by 25°F/15°C and time by ~20%.
- [Baker's Percentage Calculator - Scale Any Bread Recipe](https://toolcroft.com/bakers-percentage-calculator/): Convert any bread recipe to baker's percentages or scale from a known flour weight. Supports multiple flours and add-ins.
- [Caffeine Intake Calculator - Daily Limit & Half-Life](https://toolcroft.com/caffeine-calculator/): Calculate total daily caffeine from coffee, tea, energy drinks, and soda. See time-to-half-life and estimated sleep impact.
- [Coffee-to-Water Ratio Calculator - Brew Strength Guide](https://toolcroft.com/coffee-ratio-calculator/): Calculate coffee-to-water ratios for any brew method - drip, French press, pour-over, espresso. Enter cups or grams; get the exact recipe.
- [Cooking Substitutions - Ingredient Substitute Lookup](https://toolcroft.com/cooking-substitutions/): Find common cooking and baking ingredient substitutions instantly. Filter by vegan, gluten-free, dairy-free, or low-sodium. Works offline.
- [Meat Roasting Time Calculator - Beef, Pork, Lamb & Chicken](https://toolcroft.com/roasting-time-calculator/): Estimate roasting time ranges for beef, lamb, pork, and chicken by weight. Compare oven temperatures, doneness targets, and USDA safe-temperature guidance.
- [Oven Temperature Converter - °C, °F & Gas Mark](https://toolcroft.com/oven-temp-converter/): Convert between Celsius, Fahrenheit, and gas mark oven temperatures with common description labels (Moderate, Hot, etc.).
- [Pizza Dough Calculator - Baker's Percent Recipe Scaler](https://toolcroft.com/pizza-dough-calculator/): Calculate pizza dough ingredients by number of balls, ball weight, and hydration percentage. Supports Neapolitan, NY-style, and custom ratios.
- [Recipe Scaler - Scale Any Recipe Up or Down Online](https://toolcroft.com/recipe-scaler/): Scale any recipe up or down instantly. Paste your ingredient list, set original and target servings, and get perfectly scaled quantities with smart fraction display.
- [Turkey Cooking & Thaw-Time Calculator](https://toolcroft.com/turkey-calculator/): Calculate roasting time and safe thawing time for a whole turkey based on weight and cooking method (stuffed vs. unstuffed, fridge vs. cold-water thaw).

### Miscellaneous
- [Carpet & Flooring Calculator - Square Yards & Cost](https://toolcroft.com/carpet-calculator/): Calculate carpet, hardwood, tile, or laminate flooring needed for a room with configurable waste percentage and price estimate.
- [Chore Chart & Household Task Manager](https://toolcroft.com/chore-chart/): Create a household chore chart, assign tasks to family members or housemates, and mark chores as done. All data is saved in your browser - no account needed.
- [Concrete Calculator - Slabs, Footings, Columns & Steps](https://toolcroft.com/concrete-calculator/): Calculate how much concrete you need for slabs, footings, round columns, or steps. Get cubic yards (or m³) and bag count for 40, 60, and 80 lb bags.
- [Drywall Calculator - Sheets & Finishing Materials](https://toolcroft.com/drywall-calculator/): Calculate drywall sheets, joint tape, and screws needed for walls and ceilings by room dimensions. Adds a 10% waste factor.
- [Eisenhower Priority Matrix](https://toolcroft.com/eisenhower-matrix/): Organize tasks into a four-quadrant Eisenhower Matrix: Do, Schedule, Delegate, Eliminate. Prioritize your work and eliminate distractions.
- [Fence Calculator - Posts, Panels & Materials](https://toolcroft.com/fence-calculator/): Calculate number of fence posts, panels, and pickets needed for a given perimeter and panel spacing.
- [Firewood (Cord) Calculator - Cords & BTU Heat Output](https://toolcroft.com/firewood-calculator/): Calculate cords of firewood by stack dimensions or estimate heating season needs. Compare BTU output across common wood species.
- [Flashcard Creator - Make, Study & Export Flashcard Decks](https://toolcroft.com/flashcard-creator/): Create flashcard decks, study with spaced-repetition (Leitner system), and import/export as JSON or CSV. Everything stored in your browser. No account needed.
- [Fuel Cost Calculator](https://toolcroft.com/fuel-cost-calculator/): Calculate the total fuel cost for any trip. Enter distance, MPG or L/100km, and price per gallon or liter. Split costs between passengers.
- [Gas Mileage (MPG) Calculator](https://toolcroft.com/gas-mileage-calculator/): Calculate your vehicle's gas mileage in MPG, km/L, and L/100km from distance traveled and fuel used.
- [Grass Seed Calculator - Overseeding & New Lawn](https://toolcroft.com/grass-seed-calculator/): Calculate grass seed quantity for new lawns or overseeding by area and grass type seeding rate.
- [Gravel & Aggregate Calculator - Tons & Cubic Yards](https://toolcroft.com/gravel-calculator/): Calculate gravel, crushed stone, sand, or mulch quantity needed for a project by area and depth. Results in cubic yards, cubic metres, and estimated tons.
- [Kanban Board (Todo / In Progress / Done)](https://toolcroft.com/kanban-board/): A lightweight Kanban board with Todo, In Progress, and Done columns. Add cards, move them between columns, and organize your personal tasks - saved to localStorage.
- [Lumber Calculator - Board-Foot Calculator Online](https://toolcroft.com/lumber-calculator/): Calculate board-feet, total cost, and estimated weight for any lumber order. Supports multiple pieces and wood species density for weight estimation.
- [Meeting Cost Calculator - Live Running Cost Clock](https://toolcroft.com/meeting-cost-calculator/): Track the real-time cost of your meetings. Enter attendee count and average salary, then start the clock to see how much the meeting costs per second, minute, and in total.
- [Mind Map / Thought Web Organizer](https://toolcroft.com/mind-map/): Create and organize mind maps in your browser. Add nodes, drag to rearrange, double-click to edit text, and save your map automatically with localStorage.
- [Mulch & Soil Calculator - How Much Mulch Do I Need?](https://toolcroft.com/mulch-calculator/): Calculate how much mulch or soil you need for garden beds. Enter bed dimensions and desired depth to get cubic feet, cubic yards, and bags to buy.
- [Notes - Online Notepad with localStorage](https://toolcroft.com/notes/): A free online notepad that saves your notes automatically in your browser. Create, edit, delete, and search notes. No account or internet connection required. All notes persist in localStorage.
- [Packing List Generator](https://toolcroft.com/packing-list-generator/): Generate a customized packing list for any trip type - beach, hiking, business travel, camping, city break, or ski trip. Check off items as you pack and save your list.
- [Paint Calculator - How Many Gallons Do I Need?](https://toolcroft.com/paint-calculator/): Calculate how much paint you need for a room. Enter dimensions or wall area, subtract windows and doors, set coverage and coats, and get gallons rounded up.
- [Ramp Slope (ADA) Calculator - Angle & Run Length](https://toolcroft.com/ramp-slope-calculator/): Calculate ramp length, angle, and slope ratio from rise and run. Checks ADA compliance (1:12 max slope) and shows results in degrees and percent grade.
- [Ranked-Choice / Instant-Runoff Vote Calculator](https://toolcroft.com/ranked-choice-calculator/): Run an instant-runoff (ranked-choice) election. Add candidates, enter ranked ballots, and see which candidate wins through progressive elimination rounds.
- [Roof Pitch Calculator - Rise/Run, Degrees & Rafter Length](https://toolcroft.com/roof-pitch-calculator/): Convert any roof pitch between rise/run ratio, degrees, and percent slope. Calculate rafter length and roof surface area instantly.
- [Stair Stringer Calculator - Rise, Run & Stringer Length](https://toolcroft.com/stair-calculator/): Calculate stair rise, run, number of steps, and stringer length from total rise and code-compliant constraints.
- [Tally Counter](https://toolcroft.com/tally-counter/): Multi-category tally counter with configurable step size. Count anything - inventory, surveys, events.
- [Tier List Maker](https://toolcroft.com/tier-list-maker/): Create a tier list by dragging items into S, A, B, C, D, and F tiers. Add your own items, rearrange them, and share the results. Saved to localStorage.
- [Tile Calculator - How Many Tiles Do I Need?](https://toolcroft.com/tile-calculator/): Calculate how many tiles you need for a floor or wall. Enter room dimensions, tile size, grout gap, and waste percentage. Instantly shows tiles needed and boxes to buy.
- [Time Blocking Day Planner - Daily Schedule Builder](https://toolcroft.com/day-planner/): Plan your day with time blocks. Add, edit, and remove schedule blocks on a visual 24-hour timeline. Your schedule is saved locally in your browser.
- [Tournament Bracket Generator - Single Elimination](https://toolcroft.com/bracket-generator/): Generate and fill a single-elimination tournament bracket. Enter up to 64 team or player names, then click to advance winners round by round.
- [Typing Speed Test - Measure Your WPM and Accuracy](https://toolcroft.com/typing-speed-test/): Test typing speed and accuracy with easy, medium, or hard passages. Review gross WPM, net WPM, and recent results saved in your browser.
- [vCard / Contact Card Generator](https://toolcroft.com/vcard-generator/): Create and download a vCard 3.0 (.vcf) contact file. Share your contact details with anyone who can import it into any phone or email client.
- [Wallpaper Calculator - How Many Rolls Do I Need?](https://toolcroft.com/wallpaper-calculator/): Calculate exactly how many wallpaper rolls you need for any room. Enter room dimensions, door and window counts, roll size, and pattern repeat.
- [Weighted Decision Matrix](https://toolcroft.com/decision-matrix/): Make better decisions by scoring options against weighted criteria. Add your own options and criteria, assign weights, rate each option, and get an objective ranked result.

## Text & Writing
### Text Tools
- [Acrostic Poem Generator - Create Personalized Name Poems](https://toolcroft.com/acrostic-generator/): Create acrostic poems from any word or name. Each letter of your word begins a new line of the poem. Customize each line and copy the result.
- [Anagram Solver - Find All Anagrams Instantly](https://toolcroft.com/anagram-solver/): Find all anagrams and sub-anagrams of any word or phrase. Unscramble letters and discover hidden words. Works entirely in your browser.
- [ASCII Text Art Generator](https://toolcroft.com/ascii-text-art/): Generate text banners with ten real FIGlet fonts, Auto or fixed widths, horizontal layout controls, and copy or download actions.
- [Bionic Reading Converter - Bold-Prefix Speed Reading Tool](https://toolcroft.com/bionic-reading-converter/): Convert any text to Bionic Reading format: the first letters of each word are bolded to guide your eye and boost reading speed. Adjust the saccade level and copy the result as HTML.
- [Braille Converter - Text to Unicode Grade-1 Braille](https://toolcroft.com/braille-converter/): Convert text to Grade-1 Braille Unicode characters and back. Visualize the 6-dot braille cell patterns for each letter. Supports a-z, 0-9, common punctuation.
- [Case Converter](https://toolcroft.com/case-converter/): Convert text to uppercase, lowercase, camelCase, PascalCase, snake_case, kebab-case, and 8 more case styles, all at once.
- [Citation Generator - APA, MLA & Chicago Formatter](https://toolcroft.com/citation-generator/): Generate APA 7, MLA 9, and Chicago citations for books, journal articles, websites, and more.
- [Clipboard to Markdown - Paste Rich Text as Markdown](https://toolcroft.com/clipboard-to-markdown/): Paste rich text copied from a webpage, Google Doc, or Word file and get clean Markdown back, ready for an AI prompt. Links, headings, and lists are preserved. Runs entirely in your browser.
- [Emoji Picker - Browse & Copy Emojis](https://toolcroft.com/emoji-picker/): Browse, search, and copy emojis by category. Includes smileys, people, animals, food, objects, symbols, and more.
- [Extractive Text Summarizer - TF-IDF Key Sentence Extractor](https://toolcroft.com/text-summarizer/): Automatically summarize long text by extracting the most important sentences using TF-IDF scoring. Adjust the number of sentences to keep and copy the summary.
- [Fancy Text Generator - Strikethrough, Bold, Italic & More](https://toolcroft.com/fancy-text-generator/): Convert text into bold, italic, strikethrough, small caps, upside-down, bubble, and 10+ Unicode styles. Copy any style instantly.
- [Find and Replace](https://toolcroft.com/find-and-replace/): Find and replace text online with support for case-sensitive, whole-word, and regex modes. Instantly replace all occurrences.
- [HTML to Markdown Converter - Free Online Tool](https://toolcroft.com/html-to-markdown/): Convert HTML to Markdown instantly in your browser. Supports headings, lists, tables, links, images, code blocks, and more. No server, no signup.
- [International Phone Number Formatter - E.164 & Local Formats](https://toolcroft.com/phone-formatter/): Format phone numbers in E.164, national, and international formats. Supports 20+ countries including US, UK, Germany, Japan, India, and more.
- [Leet Speak (1337) Converter - Text to L33T Translator](https://toolcroft.com/leet-speak-converter/): Convert plain text to leet speak (1337) and back. Choose basic substitutions (4,3,1,0,5,7) or advanced mode with @ and more. Copy results instantly.
- [Line Number Adder - Add Line Numbers to Text](https://toolcroft.com/line-number-adder/): Add line numbers to any block of text. Choose the starting number, separator, padding, and whether to skip blank lines.
- [Lorem Ipsum Generator](https://toolcroft.com/lorem-ipsum-generator/): Generate lorem ipsum placeholder text by words, sentences, paragraphs, or bytes. Classic Latin, hipster, corporate, and bacon variants.
- [Markdown Editor with Live Preview](https://toolcroft.com/markdown-editor/): Free online Markdown editor with live preview, toolbar shortcuts, multi-document tabs, and localStorage autosave. Export as .md or .html. No login required.
- [Markdown to HTML Preview](https://toolcroft.com/markdown-preview/): Live Markdown editor with instant HTML preview, including tables, task lists, code blocks, and GitHub Flavored Markdown. Copy the rendered HTML with one click.
- [Mnemonic (First-Letter) Generator - Acronym Memory Aid](https://toolcroft.com/mnemonic-generator/): Create mnemonic phrases from acronyms (e.g. ROYGBIV -> "River Oak Yellow") or extract an acronym from any sentence. Perfect for memorising lists, sequences, and study material.
- [Morse Code Translator - Text to Morse and Back](https://toolcroft.com/morse-code-translator/): Instantly translate text to Morse code or decode Morse back to text. Supports all ITU letters, digits, and punctuation. Auto-detects direction.
- [Name Generator](https://toolcroft.com/name-generator/): Generate fantasy, sci-fi, medieval, and business names by combining syllable patterns. Great for characters and brands.
- [NATO Phonetic Alphabet Converter - Spell Words Phonetically](https://toolcroft.com/nato-phonetic-converter/): Convert any text to the NATO phonetic alphabet (Alpha, Bravo, Charlie…). Useful for spelling names or codes over the phone.
- [Palindrome Checker & Generator - Test & Create Palindromes](https://toolcroft.com/palindrome-checker/): Check if any word, phrase, or sentence is a palindrome (reads the same forwards and backwards). Ignores spaces and punctuation. Also finds the longest palindromic substring and generates palindromes from a prefix.
- [Pig Latin Translator - Convert English to Pig Latin](https://toolcroft.com/pig-latin-translator/): Translate English text to Pig Latin instantly. Preserves capitalization and punctuation with configurable options.
- [Random Word Generator](https://toolcroft.com/random-word-generator/): Generate random nouns, verbs, adjectives, and adverbs. Filter by part of speech and copy all at once.
- [Reading Level Estimator - Flesch-Kincaid, Fog, Coleman-Liau & More](https://toolcroft.com/reading-level-estimator/): Check the reading level of any text using 5 readability formulas: Flesch-Kincaid, Gunning Fog, Coleman-Liau, SMOG, and ARI.
- [Reading Time Estimator - How Long to Read Your Article](https://toolcroft.com/reading-time-estimator/): Estimate how long it takes to read any text. Shows reading time for slow, average, fast, and speed readers based on word count. Also counts words, characters, and sentences.
- [Remove Duplicate Lines](https://toolcroft.com/remove-duplicates/): Remove duplicate lines from text instantly. Case-sensitive or case-insensitive, with optional whitespace trimming. See counts of removed duplicates. Runs entirely in your browser.
- [Reverse Text - Flip Characters, Words, or Lines](https://toolcroft.com/reverse-text/): Reverse text instantly by characters, words, lines, or per-line. Supports Unicode, emoji, and accented characters. Copy with one click.
- [Rhyme Finder](https://toolcroft.com/rhyme-finder/): Find words that rhyme with any English word, grouped by rhyming suffix. Great for poetry and song lyrics.
- [Slug Generator](https://toolcroft.com/slug-generator/): Convert any text to a clean URL slug. Choose hyphen, underscore, or dot separator. Transliterate accented characters, set max length. Free, runs in your browser.
- [Sort Lines](https://toolcroft.com/sort-lines/): Sort lines of text alphabetically, numerically, by length, or randomly. Ascending or descending, case-insensitive or case-sensitive. All processing runs in your browser.
- [Soundex & Metaphone Phonetic Name Matcher](https://toolcroft.com/phonetic-matcher/): Check if two names sound the same using the Soundex and Metaphone phonetic algorithms. Useful for name deduplication, genealogy research, and fuzzy name matching.
- [Speed Reading Trainer - RSVP Flash Card Reader](https://toolcroft.com/speed-reading-trainer/): Train yourself to read faster with Rapid Serial Visual Presentation (RSVP). Paste any text or pick a sample passage, set your WPM speed, and the trainer flashes one word at a time at your chosen pace.
- [SWIFT / BIC Code Validator - Bank Identifier Code Checker](https://toolcroft.com/swift-code-validator/): Validate and decode SWIFT/BIC codes. See the breakdown of bank code, country, location code, and branch. Includes country name lookup for 60+ countries.
- [Syllable Counter](https://toolcroft.com/syllable-counter/): Count syllables in any word or passage of text. Useful for writing haiku, poetry, and song lyrics.
- [Text Indenter / Dedenter - Add or Remove Indentation](https://toolcroft.com/text-indenter/): Add or remove indentation from every line of text. Choose spaces or tabs and set the indentation amount.
- [Text Redactor - Mask & Remove PII from Text](https://toolcroft.com/text-redactor/): Auto-detect and mask emails, phone numbers, SSNs, credit cards, IP addresses, and more from any text. 100% client-side, so your data never leaves your browser.
- [Text Similarity Calculator - Compare Two Texts](https://toolcroft.com/text-similarity-calculator/): Measure the similarity between two texts using Levenshtein distance, Jaccard, cosine, or overlap coefficient algorithms.
- [Text Statistics - Word Count, Reading Time & More](https://toolcroft.com/text-statistics/): Analyze any text to get word count, character count, sentence count, reading time, speaking time, unique word count, and more.
- [Text to Handwriting Converter](https://toolcroft.com/text-to-handwriting/): Render typed text as a handwritten-style note on lined paper. Customize ink color and download as PNG.
- [Text to Speech - Browser TTS Player](https://toolcroft.com/text-to-speech/): Convert any text to speech using your browser's built-in TTS engine. Choose voice, rate, and pitch. Entirely client-side.
- [Text Truncator - Truncate Text by Characters or Words](https://toolcroft.com/text-truncator/): Truncate any text to a set number of characters or words. Choose ellipsis position (end, middle, start) and word-boundary breaking.
- [Title Case Converter](https://toolcroft.com/title-case-converter/): Convert text to proper title case following AP or Chicago style guide rules for capitalization.
- [Unslugify Tool - Convert Slugs to Human-Readable Text](https://toolcroft.com/unslugify-tool/): Convert URL slugs, file names, and kebab-case or snake_case identifiers into human-readable text. Choose title, sentence, lower, or UPPER output.
- [Upside Down Text Generator](https://toolcroft.com/upside-down-text/): Flip your text upside down using Unicode character substitutions. Copy the result for social media and chats.
- [Username Generator](https://toolcroft.com/username-generator/): Generate unique usernames by combining random adjectives and nouns. Choose camelCase, snake_case, kebab-case, or lowercase styles.
- [Whitespace Cleaner - Remove & Fix Whitespace in Text](https://toolcroft.com/whitespace-cleaner/): Clean up whitespace in text: trim lines, collapse spaces, remove or collapse blank lines, and convert tabs to spaces.
- [Word & Character Counter](https://toolcroft.com/word-counter/): Count words, characters, sentences, and reading time. Updates as you type.
- [Word Cloud Generator](https://toolcroft.com/word-cloud-generator/): Paste text to generate a visual word cloud. Filter stop words, choose color themes, and download as SVG.
- [Word Frequency Counter - Analyze Text Word Usage](https://toolcroft.com/word-frequency-counter/): Analyze any text to find the most frequently used words. See word counts, percentages, unique word count, and filter out common stop words.
- [Writing Prompt Generator](https://toolcroft.com/writing-prompt-generator/): Get random creative writing prompts across fantasy, sci-fi, romance, horror, mystery, and general fiction genres.
- [Zalgo Text Generator](https://toolcroft.com/zalgo-text/): Add creepy glitchy combining Unicode characters to your text to create Zalgo-style corrupted text effects.

### SEO & Marketing
- [Heading Structure Analyzer - Outline & SEO Checker](https://toolcroft.com/heading-structure-analyzer/): Paste any HTML to extract and visualize the H1–H6 heading outline. Flags multiple H1s, skipped levels, and empty headings for SEO review.
- [Keyword Density Analyzer - Check Word Frequency & TF](https://toolcroft.com/keyword-density-analyzer/): Analyze any body of text for word frequency, keyword density %, and n-gram patterns. Toggle stop-word filtering, pin target keywords, and see a visual bar chart.
- [Meta Tag Generator - OG & Twitter Card Builder](https://toolcroft.com/meta-tag-generator/): Generate complete HTML <head> meta tags: title, description, canonical, Open Graph, and Twitter Card. Preview and copy the ready-to-paste code block. All processing is local.
- [Open Graph Preview - Social Card Simulator](https://toolcroft.com/open-graph-preview/): Preview five social cards from pasted HTML or tags. Inputs stay in your browser; page URLs aren't fetched, but preview images load from supplied URLs.
- [Schema Markup Generator - JSON-LD Structured Data](https://toolcroft.com/schema-markup-generator/): Build copy-ready JSON-LD for seven page types with live previews, basic completeness checks, and blank-value cleanup.
- [SERP Preview - Google Snippet Simulator](https://toolcroft.com/serp-preview/): Preview Google search snippets with approximate desktop and mobile pixel widths for titles and descriptions. Measure truncation as you edit, locally.
- [Title Tag Checker - Bulk Pixel-Width Validator](https://toolcroft.com/title-tag-checker/): Paste multiple page titles (one per line) to instantly see their pixel widths, pass/fail against Google thresholds, and optionally append a brand suffix.
- [UTM Builder - Campaign URL Builder & QR Code](https://toolcroft.com/utm-builder/): Build UTM-tagged campaign URLs for Google Analytics. Round-trips existing UTM params, adds optional lowercase normalization, generates a QR code, and copies as plain URL or Markdown link.

### Social Media & Creator
- [Content Calendar Planner - Offline Social Media Scheduler](https://toolcroft.com/content-calendar-planner/): Plan and schedule social media posts on a month/week/list grid. Color-coded by platform and status. Everything saved in your browser - no account, no sync, export/import as JSON.
- [CPM / CPC / ROAS Calculator - Bidirectional Ad Math](https://toolcroft.com/cpm-calculator/): Solve for CPM, CPC, CTR, impressions, clicks, spend, conversions, CPA, or ROAS - enter any known values and the rest calculate automatically.
- [Engagement Rate Calculator - ER by Followers & Reach](https://toolcroft.com/engagement-rate-calculator/): Calculate engagement rate by followers, by reach, or by impressions. Per-post and account-average modes with benchmark context bands for each platform.
- [Fake Tweet Generator - Mock Post Screenshot Maker](https://toolcroft.com/fake-tweet-generator/): Create mock social-post screenshots rendered on an HTML canvas. Customize display name, handle, text, likes, and retweets. Download as PNG. Watermark on by default.
- [Hashtag Generator - Niche Hashtag Suggestions](https://toolcroft.com/hashtag-generator/): Generate relevant hashtag suggestions from a topic or keyword using a bundled offline dataset. CamelCase toggle, chip cloud UI, 30-tag limit for Instagram.
- [Social Media Character Counter - All Platforms](https://toolcroft.com/social-character-counter/): Compare X weighted counts and platform character limits, with live word, hashtag, mention, link, and emoji statistics.
- [Social Media Image Size Guide - 2026 Dimensions](https://toolcroft.com/social-image-size-guide/): Compare 2026 social image sizes, check a local image's aspect ratio and resolution, and copy or export placement dimensions without uploading files.
- [Subscriber Milestone Countdown - Growth Projection](https://toolcroft.com/subscriber-milestone-countdown/): Project when you will hit your next subscriber or follower milestone using linear or compounding growth models. Download a .ics calendar event for the projected date.
- [Tweet / Thread Splitter - Long Text to Thread Posts](https://toolcroft.com/tweet-thread-splitter/): Split long text into numbered thread posts that fit X/Twitter (280 chars) or any custom limit. Greedy sentence-packing, two-pass numbering, drag-to-reorder.
- [YouTube Earnings Estimator - Revenue Projection](https://toolcroft.com/youtube-earnings-estimator/): Estimate YouTube ad revenue from view count and RPM. See daily, monthly, and yearly income projections with low/mid/high range bands. Estimate only - not connected to YouTube.

## Developer & Web
### Developer Tools
- [.editorconfig Generator](https://toolcroft.com/editorconfig-generator/): Generate .editorconfig files with global settings and per-file-type overrides. Copy the output.
- [.gitignore Generator - Create .gitignore Files Instantly](https://toolcroft.com/gitignore-generator/): Generate .gitignore files for Node, Python, Java, Go, Rust, and 15+ languages, frameworks, and IDEs.
- [ARIA Role & Landmark Reference - Accessibility Attribute Guide](https://toolcroft.com/aria-reference/): Browse all 50+ WAI-ARIA roles with descriptions and HTML examples. Filter by category (Landmark, Widget, Document) or search by name to find the right role for accessible UI.
- [ASCII Table - Full Character Reference (0–127)](https://toolcroft.com/ascii-table/): Complete, searchable ASCII character table. Look up any character by decimal, hex, octal, binary, abbreviation, or description. Includes control characters, escape sequences, and printable characters.
- [Aspect Ratio Calculator - Find, Simplify & Compare Ratios](https://toolcroft.com/aspect-ratio-calculator/): Find a missing width or height from an aspect ratio, simplify any W×H pair to its simplest ratio, or compare two sets of dimensions. Includes presets for 16:9, 4:3, 21:9, and more.
- [Barcode Generator - Create Code 128, EAN-13, UPC-A Barcodes](https://toolcroft.com/barcode-generator/): Generate 1-D barcodes in Code 128, Code 39, EAN-13, EAN-8, and UPC-A formats. Preview as SVG, download as PNG. All processing is done in your browser.
- [Bcrypt Hash Generator & Verifier - Client-Side Password Hashing](https://toolcroft.com/bcrypt-generator/): Generate and verify bcrypt password hashes in a browser-only worker. Inspect hash fields, check the 72-byte limit, and benchmark costs from 4–14.
- [Box Drawing Generator - ASCII/Unicode Boxes & Tables](https://toolcroft.com/box-drawing-generator/): Generate Unicode box-drawing frames, borders, and ASCII tables. Choose from single, double, rounded, and bold styles. Copy the result for use in terminal output or documentation.
- [Browser Storage Inspector - localStorage & sessionStorage Viewer](https://toolcroft.com/browser-storage-inspector/): View, add, edit, and delete localStorage and sessionStorage entries in your browser. See the byte size of each key, total storage usage, and switch between storage types.
- [chmod Calculator - Unix File Permission Generator](https://toolcroft.com/chmod-calculator/): Calculate Unix file permissions visually. Toggle read/write/execute bits for owner, group, and other and get the octal code and chmod command.
- [Cookie Parser](https://toolcroft.com/cookie-parser/): Parse Set-Cookie headers and Cookie request headers into structured attribute tables.
- [Cron Expression Builder / Explainer](https://toolcroft.com/cron-expression-builder/): Build or decode cron expressions. Type an expression for a plain-English explanation and next 10 run times. Or use the visual builder to create one field by field.
- [CSS @media Query Builder - Viewport & Breakpoint Tester](https://toolcroft.com/media-query-builder/): Build CSS @media queries visually. Set min/max width, height, orientation, prefers-color-scheme, and more. Preview the result and test against your current viewport.
- [CSS 3D Transform Generator - Rotate, Scale, Skew & Perspective](https://toolcroft.com/css-transform-generator/): Generate CSS 3D transform values visually. Rotate on X/Y/Z axes, scale, skew, translate, and add perspective. See a live preview and copy the generated CSS instantly.
- [CSS Button Generator - Custom Button Style Designer](https://toolcroft.com/css-button-generator/): Design CSS buttons with a live preview. Adjust colors, hover states, borders, spacing, and typography; check contrast and copy CSS and HTML.
- [CSS Formatter & Minifier](https://toolcroft.com/css-formatter/): Beautify or minify CSS online. Adds indentation and line breaks, or strips whitespace for production, all in your browser. Nothing is uploaded.
- [CSS Specificity Calculator - Understand Selector Weight](https://toolcroft.com/css-specificity-calculator/): Calculate and compare CSS selector specificity scores (a,b,c,d). See which rule wins and why, with support for :is(), :not(), :where(), and pseudo-elements.
- [CSS Text Shadow Generator - Multi-Layer Shadow Builder](https://toolcroft.com/text-shadow-generator/): Create CSS text-shadow effects with multiple layers. Adjust offset, blur, and color for each layer. Choose from presets like neon glow, emboss, and outline, then copy the generated CSS.
- [CSS Transition & Easing Visualizer - Live Timing Curve Editor](https://toolcroft.com/css-transition-visualizer/): Visualize CSS transitions with an interactive easing curve. Choose a preset (ease, linear, ease-in, ease-out) or define a custom cubic-bezier, set duration and delay, and see the live animation.
- [CSS Triangle / Arrow Generator - Pure CSS Shapes](https://toolcroft.com/css-triangle-generator/): Generate CSS triangles in eight directions. Set width, height, and color, preview border and clip-path versions, and copy stylesheet-ready CSS.
- [CSS Variable Extractor - Custom Property Inspector & Exporter](https://toolcroft.com/css-variable-extractor/): Paste any CSS and instantly extract all custom properties (CSS variables). View them in a sortable table with their values and selectors, then export as a clean CSS snippet or CSV.
- [CSV to JSON Converter](https://toolcroft.com/csv-to-json/): Convert CSV to JSON instantly in your browser. Auto-detect delimiter, type inference, header row toggle, and full RFC 4180 quoting support.
- [CSV Viewer & Editor](https://toolcroft.com/csv-viewer/): Paste or upload CSV data to view it as a formatted table. Edit cells inline and download the modified CSV.
- [cURL Command Builder - Build and Copy cURL Commands](https://toolcroft.com/curl-command-builder/): Visually build cURL commands without memorising flags. Set the HTTP method, URL, headers, body (JSON, form, raw), and authentication, then copy the ready-to-run command.
- [Data URI Generator](https://toolcroft.com/data-uri-generator/): Convert text or files to Base64 data URIs for embedding directly in HTML, CSS, or JavaScript.
- [Docker Compose Generator - Service Configuration Builder](https://toolcroft.com/docker-compose-generator/): Build docker-compose.yml files visually. Add multiple services with images, ports, environment variables, volumes, depends_on, and restart policies, then copy the generated YAML.
- [Env File Editor - Parse, Edit & Convert .env Files](https://toolcroft.com/env-file-editor/): Parse .env files, view all key-value pairs in a clean table, add or edit entries, convert to/from JSON, and copy the result, all in your browser.
- [Flexbox Playground](https://toolcroft.com/flexbox-playground/): Explore Flexbox direction, wrapping, alignment, gap, and item sizing in a live preview. Tune grow, shrink, and basis values, then copy CSS.
- [Font Preview & Pairing Sandbox - System & Web-Safe Font Tester](https://toolcroft.com/font-preview/): Preview system fonts and web-safe font stacks with custom text. Filter by category (serif, sans-serif, monospace, cursive, fantasy), adjust size and weight, and copy the font-family stack.
- [Git Command Builder](https://toolcroft.com/git-command-builder/): Browse and search all common Git commands with descriptions and flag references. Copy any command.
- [GitHub Actions Workflow Builder - CI/CD YAML Generator](https://toolcroft.com/github-actions-builder/): Build GitHub Actions CI/CD workflows visually. Configure triggers, Node.js version, package manager, and pipeline steps, then get a ready-to-use .yml file.
- [Hex Dump Viewer - Text or File to Hex and ASCII](https://toolcroft.com/hex-dump-viewer/): Display the hex dump of typed text or an uploaded file. Shows the byte offset, hexadecimal values, and printable ASCII representation in the classic xxd/od style.
- [HTML Formatter & Beautifier](https://toolcroft.com/html-formatter/): Format and beautify HTML online. Adds indentation, fixes nesting, and optionally self-closes void elements, all in your browser. Nothing is uploaded.
- [HTTP Header Analyzer - Inspect & Validate Headers](https://toolcroft.com/http-header-analyzer/): Paste HTTP response headers to get instant explanations, security scoring, cookie flag checks, CSP analysis, and actionable recommendations, all offline.
- [HTTP Status Codes - Complete Reference](https://toolcroft.com/http-status-codes/): Searchable reference for all HTTP status codes: 1xx, 2xx, 3xx, 4xx, and 5xx. Find any code by number, name, or description. Includes IANA-registered and commonly used codes.
- [IP Subnet Calculator](https://toolcroft.com/subnet-calculator/): Calculate IPv4 subnet properties from an IP + CIDR prefix. Get network address, broadcast, first/last host, subnet mask, wildcard mask, and binary breakdown.
- [IPv6 Address Expander / Compressor - Full and Short IPv6 Notation](https://toolcroft.com/ipv6-expander/): Expand an abbreviated IPv6 address to its full 8-group notation, or compress a full address to its canonical short form. Validates IPv6 syntax including embedded IPv4 addresses.
- [JavaScript Formatter & Minifier](https://toolcroft.com/js-formatter/): Beautify or minify JavaScript online. Format messy JS with proper indentation, or compress it for production. Runs entirely in your browser.
- [JSON ↔ XML Converter - Bidirectional JSON and XML Conversion](https://toolcroft.com/json-xml-converter/): Convert JSON to XML or XML to JSON instantly in the browser. Handles nested objects, arrays, and proper XML entity escaping with a live side-by-side editor.
- [JSON ↔ YAML Converter - Convert Between JSON and YAML](https://toolcroft.com/json-yaml-converter/): Convert JSON to YAML or YAML to JSON instantly in your browser. Supports nested objects, arrays, and all scalar types. No data leaves your device.
- [JSON Diff Viewer - Compare Two JSON Documents](https://toolcroft.com/json-diff-viewer/): Compare JSON documents side by side. Find nested changes, open local files, copy JSON Pointers, and export a browser-generated JSON Patch.
- [JSON Formatter & Validator - Pretty Print, Minify, Validate](https://toolcroft.com/json-formatter/): Format, validate, and minify JSON instantly in your browser. Pretty-print with 2-space, 4-space, or tab indentation. Sort keys alphabetically. Parse errors shown with line and column.
- [JSON Path Tester - Test JSONPath Expressions Online](https://toolcroft.com/json-path-tester/): Test JSONPath expressions against any JSON document in real time. Supports dot notation, wildcards, recursive descent, array slices, and filter expressions.
- [JSON Schema Validator - Validate JSON Online](https://toolcroft.com/json-schema-validator/): Validate any JSON document against a JSON Schema (Draft-07 subset) right in your browser. Supports type, required, properties, allOf/anyOf/oneOf, $ref, format checks, and more.
- [JSON to CSV Converter](https://toolcroft.com/json-to-csv/): Convert a JSON array of objects to CSV in your browser. Custom delimiter, quote-all, header toggle, and nested object flattening.
- [JSON to TypeScript](https://toolcroft.com/json-to-typescript/): Paste JSON and instantly generate TypeScript interfaces with proper nested types.
- [JWT Decoder](https://toolcroft.com/jwt-decoder/): Decode any JSON Web Token in your browser: view the header, payload, standard claims, expiry status, and raw base64url parts. Nothing sent to a server.
- [JWT Generator / Signer - HS256 Client-Side JWT Creator](https://toolcroft.com/jwt-generator/): Generate and sign JSON Web Tokens (JWT) using HMAC-SHA256 (HS256) entirely in the browser. Edit the payload, set a secret key, and inspect the decoded header, payload, and signature.
- [LLM Token Counter - Count GPT & Claude Tokens](https://toolcroft.com/llm-token-counter/): Count exact GPT tokens (o200k_base, cl100k_base) plus a labeled Claude estimate. See per-model cost at your own price. Runs entirely in your browser.
- [Log Timestamp Converter & Time Delta Annotator](https://toolcroft.com/log-timestamp-annotator/): Convert log timestamps to local time and add compact elapsed-time annotations. Supports UTC, timezones, custom regex, and formats in your browser.
- [Markdown Table Generator - Build Tables Visually](https://toolcroft.com/markdown-table-generator/): Create Markdown tables by filling in a visual grid. Set column alignment, add rows and columns, copy the result.
- [Markdown TOC Generator](https://toolcroft.com/markdown-toc-generator/): Paste Markdown and generate a table of contents with anchor links. Configure depth and style.
- [MIME Type Lookup - Find MIME Types by Extension or Name](https://toolcroft.com/mime-type-lookup/): Look up MIME types by file extension, or find extensions for a MIME type. Covers 100+ types across images, audio, video, documents, fonts, and more, fully offline.
- [Number Base Converter - Binary, Octal, Decimal, Hex](https://toolcroft.com/number-base-converter/): Convert numbers between binary (base 2), octal (base 8), decimal (base 10), hexadecimal (base 16), and any base 2–36. Uses BigInt for large numbers.
- [OAuth 2.0 PKCE Generator - Code Verifier & Challenge for S256](https://toolcroft.com/oauth-pkce-generator/): Generate OAuth 2.0 PKCE code_verifier and code_challenge (S256) pairs for public clients. Build the complete authorization URL with client ID, redirect URI, scope, and state.
- [On-Screen Pixel Ruler - Measure Anything on Your Screen](https://toolcroft.com/screen-ruler/): A free on-screen pixel ruler that shows pixels, inches, centimetres, and millimetres. Enter your screen DPI for accurate physical measurements.
- [PPI Calculator - Pixels Per Inch & Dot Pitch](https://toolcroft.com/ppi-calculator/): Calculate pixels per inch (PPI), dot pitch, and total pixel count from your screen resolution and diagonal size. See whether your display is retina-class.
- [Public/Private Keypair Generator - RSA & EC Keys Online](https://toolcroft.com/keypair-generator/): Generate RSA or Elliptic Curve (ECDSA, ECDH) public/private keypairs in your browser using the Web Crypto API. Export as PEM or JWK. Keys never leave your device.
- [PX to REM/EM Converter - CSS Unit Converter](https://toolcroft.com/px-to-rem-converter/): Convert between px, rem, em, %, and pt for any root and parent font size. Bulk-convert a list of pixel values to get a full CSS unit table instantly.
- [Query String Parser](https://toolcroft.com/query-string-parser/): Parse URL query strings into key-value tables and build query strings from your own values.
- [Regex Cheat Sheet](https://toolcroft.com/regex-cheatsheet/): Browse and search a comprehensive regex cheat sheet. Test patterns against sample text instantly.
- [Regex Tester](https://toolcroft.com/regex-tester/): Live regular expression tester with instant match highlighting, capture groups, replace and split modes, pattern explainer, cheat sheet, and worker-based timeout protection.
- [Resistor Color Code Calculator - 4, 5 & 6 Band](https://toolcroft.com/resistor-color-code/): Decode resistor color bands to resistance and tolerance, or enter a value to find the matching band colors. Supports 4-band, 5-band, and 6-band resistors.
- [robots.txt Generator - Build Your Crawler Rules File](https://toolcroft.com/robots-txt-generator/): Generate a valid robots.txt file for your website. Control which bots can crawl which pages, add sitemap URLs, set crawl delays, and use presets for common configurations.
- [Semver Comparator - Compare Semantic Version Numbers](https://toolcroft.com/semver-comparator/): Compare two semantic version strings (1.2.3, v2.0.0-beta.1) to find which is greater, sort a list of versions, or calculate the next bump.
- [SQL Formatter & Beautifier](https://toolcroft.com/sql-formatter/): Format and beautify SQL online. Supports PostgreSQL, MySQL, T-SQL, SQLite, MariaDB, and PL/SQL. Choose keyword case and indentation, all in your browser.
- [SQL JOIN Visualizer](https://toolcroft.com/sql-join-visualizer/): Visualize all 7 SQL JOIN types with Venn diagrams, descriptions, and ready-to-use SQL examples.
- [String Byte-Size Counter - UTF-8, UTF-16, and UTF-32 Lengths](https://toolcroft.com/string-byte-counter/): Count how many bytes a string occupies in UTF-8, UTF-16 LE/BE, and UTF-32 encodings. See which characters are multi-byte and their individual byte sizes.
- [String Escaper](https://toolcroft.com/string-escaper/): Escape and unescape strings for JSON, HTML, URL, regex, SQL, and Base64 encoding.
- [SVG Optimizer - Minify and Clean SVG Files Online](https://toolcroft.com/svg-optimizer/): Optimize and minify SVG files by removing comments, metadata, whitespace, and empty attributes, all in your browser with instant size savings stats.
- [SVG to PNG/JPG Rasterizer - Convert SVG to Image Online](https://toolcroft.com/svg-rasterizer/): Convert SVG files to PNG or JPEG raster images in your browser. Choose scale factor and background color. No upload, instant download.
- [Text Diff Viewer - Compare Two Texts Side by Side](https://toolcroft.com/text-diff/): Compare two texts side by side or in unified format. Highlights added, removed, and modified lines with word- and character-level inline diff. Free, private, runs in your browser.
- [TOML ↔ JSON Converter - Convert Online](https://toolcroft.com/toml-json-converter/): Convert TOML to JSON or JSON to TOML instantly in your browser. Supports tables, arrays of tables, inline tables, dotted keys, and all TOML scalar types.
- [Type Scale Generator - CSS Typography Scale](https://toolcroft.com/type-scale-generator/): Generate a harmonious typographic scale for any base font size and modular ratio. Output CSS custom properties, Tailwind config values, or a plain table of font sizes.
- [ULID Generator - Sortable Unique ID Generator](https://toolcroft.com/ulid-generator/): Generate ULIDs (Universally Unique Lexicographically Sortable Identifiers) in the browser. ULIDs combine a millisecond-precision timestamp with cryptographic randomness into a 26-character Crockford Base32 string.
- [Unicode Inspector](https://toolcroft.com/unicode-inspector/): Inspect every character in a string: code points, hex, HTML entities, CSS escapes, and categories.
- [URL Parser & Inspector - Decode Any URL Instantly](https://toolcroft.com/url-parser/): Parse any URL into its components: protocol, hostname, port, path, query parameters, and hash. Decode query strings, inspect domain parts, and build custom URLs.
- [User Agent Parser](https://toolcroft.com/user-agent-parser/): Decode any User-Agent string into browser name, version, OS, device type, rendering engine, and CPU architecture, instantly in your browser.
- [UUID Inspector - Parse and Explain UUID / GUID Strings](https://toolcroft.com/uuid-inspector/): Paste any UUID (v1 through v7, Nil, Max) to see its version, variant, embedded timestamp, node address, and a full field-by-field breakdown, fully offline.
- [Wi-Fi QR Code Generator - Share Wi-Fi Credentials Instantly](https://toolcroft.com/wifi-qr-generator/): Generate a scannable QR code for your Wi-Fi network. Guests can scan it with any modern phone camera to connect instantly - no typing required. Supports WPA, WEP, and open networks.
- [XML Formatter & Validator](https://toolcroft.com/xml-formatter/): Format, beautify, or minify XML online. Validates well-formedness, highlights errors, and supports custom indentation, all in your browser.
- [YAML Formatter & Validator](https://toolcroft.com/yaml-formatter/): Format and validate YAML online. Detect syntax errors, pretty-print with custom indent, and convert JSON to YAML, all in your browser.
- [ZIP File Creator - Create ZIP Archives in Your Browser](https://toolcroft.com/zip-creator/): Create ZIP files directly in your browser. Add text files with custom names and content, then download the archive instantly. No uploads, no server.

### Encoding Tools
- [Base32 Encoder/Decoder - RFC 4648, Crockford & Base32hex](https://toolcroft.com/base32-encoder/): Encode UTF-8 text or hex bytes and decode Base32 as text or hex with RFC 4648, Base32hex, or Crockford alphabets in your browser.
- [Base64 Encoder / Decoder](https://toolcroft.com/base64-encoder/): Encode text or files to Base64 online: standard, URL-safe, and Base64url variants. Decode back to text or download as a file. All processing is local.
- [Binary Text Encoder/Decoder - Text to Binary & Back](https://toolcroft.com/binary-text-encoder/): Convert any UTF-8 text to binary (8-bit groups) or decode binary back to text. Choose your separator format. Free, instant, browser-only.
- [HTML Entity Encoder / Decoder](https://toolcroft.com/html-entity-encoder/): Encode special characters to HTML entities and decode them back. Supports named (&amp;amp;), decimal (&#38;), and hex (&#x26;) styles. Runs entirely in your browser.
- [Punycode (IDN) Encoder/Decoder - Convert Unicode Domains](https://toolcroft.com/punycode-encoder/): Encode Unicode / internationalized domain names (IDN) to Punycode (xn--) and decode them back. Implements RFC 3492 entirely in the browser.
- [QR Code Generator](https://toolcroft.com/qr-code-generator/): Generate QR codes for URLs, text, Wi-Fi, vCards, email, SMS, phone, geo, crypto, and calendar events. Customize colors, size, and error correction. Download as PNG or SVG.
- [Quoted-Printable Encoder/Decoder - RFC 2045 QP Online](https://toolcroft.com/quoted-printable-encoder/): Encode text to Quoted-Printable (QP) or decode QP back to plain text. Implements RFC 2045 Section 6.7 with proper 76-char line wrapping.
- [URL Encoder / Decoder](https://toolcroft.com/url-encoder/): Encode and decode URLs online: encodeURIComponent for query values, encodeURI for full URLs, or percent-decode any encoded string. All processing is local.
- [URL-Safe Base64 Encoder - Base64url Encode & Decode](https://toolcroft.com/base64url-encoder/): Encode and decode text using URL-safe Base64 (Base64url, RFC 4648 §5). Handles + to -, / to _, optional padding. Also decodes JWT headers and payloads, fully offline.
- [UUencode / UUdecode - Encode & Decode UU Online](https://toolcroft.com/uuencode-tool/): Encode text or data to UU format and decode UU-encoded content back to plain text. Classic Unix uuencoding implemented entirely in your browser.

### Validators
- [Credit Card Validator - Luhn Check & Card Type Detector](https://toolcroft.com/credit-card-validator/): Validate credit card numbers using the Luhn algorithm. Detects Visa, Mastercard, Amex, Discover, and more. Runs entirely in your browser.
- [IBAN Validator - Check Any International Bank Account Number](https://toolcroft.com/iban-validator/): Validate IBAN country codes, lengths, BBAN formats and MOD-97 checks, or calculate check digits from a BBAN. Works locally for 86 countries.
- [ISBN Validator - Check ISBN-10 and ISBN-13 Numbers](https://toolcroft.com/isbn-validator/): Validate ISBN-10 and ISBN-13 check digits in your browser. Convert between formats and catch common entry errors without querying book databases.
- [MAC Address Validator - Validate & Decode MAC Addresses](https://toolcroft.com/mac-address-validator/): Validate any MAC address format (colon, hyphen, Cisco dot, raw hex). Identifies multicast, broadcast, and locally-administered addresses. Shows the OUI prefix.
- [UUID Validator - Validate & Decode UUID Online](https://toolcroft.com/uuid-validator/): Validate UUIDs and decode v1, v6, and v7 timestamps, clock sequence, and node locally. Supports URNs, braces, compact forms, and common UUID variants.
- [VIN Decoder - Decode Vehicle Identification Numbers Online](https://toolcroft.com/vin-decoder/): Decode any 17-character VIN instantly. Shows manufacturer region, model year, plant code, and validates the NHTSA check digit. 100% client-side.

### Password & Security
- [AES Encrypt / Decrypt Online (AES-256-GCM)](https://toolcroft.com/aes-encrypt-decrypt/): Encrypt and decrypt text in your browser using AES-256-GCM and PBKDF2. Everything stays on your device.
- [Caesar Cipher - Encode, Decode & Brute-Force](https://toolcroft.com/caesar-cipher/): Encode or decode text with the Caesar cipher. Set any shift from 1 to 25, or use brute-force mode to try all 25 possible shifts at once. Great for puzzles.
- [File Hash Calculator - SHA-256, SHA-512, SHA-1 Checksum](https://toolcroft.com/file-hash-calculator/): Calculate SHA-1, SHA-256, SHA-384, and SHA-512 hashes for any file. Drag and drop to verify file integrity. All processing happens locally in your browser.
- [Hash Generator - MD5, SHA-1, SHA-256, SHA-384, SHA-512](https://toolcroft.com/hash-generator/): Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files, instantly, in your browser. Hex or Base64 output. Nothing uploaded anywhere.
- [HMAC Generator (SHA-256 / SHA-512)](https://toolcroft.com/hmac-generator/): Generate HMAC signatures online using HMAC-SHA-256, HMAC-SHA-512, HMAC-SHA-384, or HMAC-SHA-1. Enter a message and secret key. All computation happens in your browser.
- [Passphrase Generator (Diceware)](https://toolcroft.com/passphrase-generator/): Generate strong Diceware passphrases using the EFF wordlist and Web Crypto randomness. Memorable, high-entropy, and never transmitted anywhere.
- [Password Generator](https://toolcroft.com/password-generator/): Generate strong random passwords using the Web Crypto API.
- [Password Strength Checker](https://toolcroft.com/password-strength-checker/): Check the strength of any password locally: get an entropy estimate, crack time at four attack speeds, pattern warnings, and improvement tips. Nothing sent anywhere.
- [ROT13 / ROT47 Encoder / Decoder](https://toolcroft.com/rot13/): Encode or decode text with ROT13 or ROT47 in your browser. ROT13 shifts letters; ROT47 also shifts printable ASCII punctuation and digits.
- [TOTP Code Generator (RFC 6238)](https://toolcroft.com/totp-generator/): Generate TOTP authentication codes from a Base32 secret (RFC 6238 compliant). Shows the current code, next code, and countdown timer. Everything runs in your browser.
- [Vigenère Cipher - Encode & Decode Online](https://toolcroft.com/vigenere-cipher/): Encode or decode text with the Vigenère cipher. Enter your text and a keyword; each letter shifts by the corresponding letter of the repeating keyword.

## Media & Design
### Image Tools
- [Badge Maker - Create Custom PNG Badges](https://toolcroft.com/badge-maker/): Design custom badges with text, emoji, shapes, and colors. Preview your badge live and download it as a PNG image directly from your browser.
- [BlurHash Generator - Compact Image Placeholder](https://toolcroft.com/blurhash-generator/): Encode local images into BlurHash strings, or paste a hash to decode its placeholder. Adjust component detail and preview contrast in your browser.
- [Dithering (1-bit) Image Converter - Floyd-Steinberg & Bayer](https://toolcroft.com/dither-tool/): Convert any image to 1-bit (black & white) using three classic dithering algorithms: simple threshold, Floyd-Steinberg error diffusion, or Bayer ordered dithering. Download as PNG.
- [Duotone Image Generator - Two-Color Photo Effect](https://toolcroft.com/duotone-generator/): Apply a duotone effect to any image: choose a shadow color and a highlight color and the tool maps the entire photo to a two-color palette. Download the result as PNG.
- [EXIF Metadata Remover - Strip Photo Metadata for Privacy](https://toolcroft.com/exif-remover/): Remove EXIF metadata from photos before sharing them online. GPS location, camera model, date taken, and other embedded metadata are stripped by re-rendering the image through a browser canvas.
- [EXIF Metadata Viewer - Read Image Camera Data Online](https://toolcroft.com/exif-viewer/): View EXIF metadata from any JPEG image: camera make/model, GPS location, exposure settings, and more. Runs entirely in your browser. Images never leave your device.
- [Favicon Generator](https://toolcroft.com/favicon-generator/): Generate a complete favicon set from any image: 16×16, 32×32, 180×180 Apple touch icon, 192×192, and 512×512 PNG files plus a site.webmanifest. Download as ZIP. No uploads.
- [GIF Maker - Convert Video to GIF](https://toolcroft.com/gif-maker/): Turn an MP4, WebM, or MOV clip into an animated GIF entirely in your browser. Trim, set frame rate and width, and download - your video never leaves your device.
- [Halftone Image Generator - Dot Pattern Photo Effect](https://toolcroft.com/halftone-generator/): Convert any photo to a halftone dot pattern. Choose dot size, shape (circle or square), contrast, and colors. Download the result as PNG.
- [Image Border / Frame Adder - Add Decorative Borders](https://toolcroft.com/image-border-tool/): Add a solid colour, gradient, or drop-shadow frame to any image. Choose the border size and colour, preview the result instantly, and download as a PNG.
- [Image Color Extractor - Extract Dominant Colors from Any Photo](https://toolcroft.com/image-color-extractor/): Extract the dominant color palette from any image. Upload a photo to instantly get 4–10 dominant colors with HEX, RGB, and HSL values. Runs entirely in your browser.
- [Image Color Picker - Pick Colors from Any Image](https://toolcroft.com/image-color-picker/): Click anywhere on an image to instantly get the pixel color in HEX, RGB, and HSL. Eyedropper tool runs entirely in your browser. Images never leave your device.
- [Image Compressor](https://toolcroft.com/image-compressor/): Compress JPEG, PNG, and WebP images directly in your browser. Adjust quality, resize, convert formats, and download a ZIP of your batch. Images never leave your device.
- [Image Cropper - Crop Images Free Online](https://toolcroft.com/image-cropper/): Crop any image online for free. Set custom dimensions, lock to 1:1, 4:3, 16:9, or other aspect ratios. Preview and download instantly. Images never leave your device.
- [Image Format Converter](https://toolcroft.com/image-format-converter/): Convert images between JPEG, PNG, WebP, AVIF, and BMP directly in your browser. Batch convert multiple files and download as a ZIP. Images never leave your device.
- [Image Grid Splitter - Split Photo into Tiles](https://toolcroft.com/image-splitter/): Split any image into a grid of equal-sized tiles. Choose the number of columns and rows, preview the grid, and download all tiles as individual PNG files or as a single ZIP archive.
- [Image Histogram Viewer - Analyze RGB & Luminance Distribution](https://toolcroft.com/image-histogram/): Upload any image to instantly view its RGB and luminance histogram. Analyze tonal distribution, exposure, and color balance, all in-browser.
- [Image Region Redactor - Blur or Pixelate Sensitive Areas](https://toolcroft.com/image-redactor/): Draw rectangles over sensitive areas in a photo and apply blur, pixelation, or black-fill redaction. Works entirely in your browser - no uploads required.
- [Image Resizer](https://toolcroft.com/image-resizer/): Resize images with pixel or percentage scaling, fit, fill, or stretch modes, format conversion, and quality controls. Files never leave your device.
- [Image Rotator & Flipper - Rotate and Mirror Images Online](https://toolcroft.com/image-rotate-flip/): Rotate images 90°, 180°, or 270° and flip them horizontally or vertically, all in your browser with no upload required.
- [Image to Base64 Converter](https://toolcroft.com/image-to-base64/): Convert any image to a base64 data URL instantly in your browser. Get HTML img tag and CSS background-image snippets ready to paste. Your image never leaves your device.
- [Image Watermark Tool - Add Text Watermarks to Photos](https://toolcroft.com/image-watermark/): Add a custom text watermark to any image directly in your browser. Choose position, opacity, font size, and color. No upload, 100% private.
- [Meme Generator](https://toolcroft.com/meme-generator/): Add top and bottom text to any image and download your meme. Customize font size, stroke, text color, and stroke color. All in-browser, so your images never leave your device.
- [Noise Texture Generator - Perlin / Value Noise PNG](https://toolcroft.com/noise-texture-generator/): Generate procedural noise textures in your browser. Adjust scale, octaves, persistence, seed, and color scheme. Download as a PNG image.
- [Online Whiteboard - Free Drawing & Sketching Pad](https://toolcroft.com/whiteboard/): A free online drawing and whiteboard pad. Sketch, annotate, and draw shapes in your browser with pen, eraser, line, rectangle, circle, and fill tools. Download your drawing as a PNG. No sign-up required.
- [Open Graph / Social Card Image Generator](https://toolcroft.com/og-image-generator/): Generate a 1200x630 Open Graph social card image with custom title, subtitle, background and text colours. Preview live and download as a PNG to use with og:image meta tags.
- [Particle Playground - Canvas Animation Tool](https://toolcroft.com/particle-playground/): An interactive particle animation playground running in your browser. Adjust count, speed, size, color modes, and trail settings in real time.
- [Photomosaic Generator - Pixel Art Mosaic Effect](https://toolcroft.com/photomosaic-generator/): Upload a photo and transform it into a color-block mosaic with square or circular tiles. Adjust grid size and gap, then download the result as a PNG.
- [Pixel Art Editor](https://toolcroft.com/pixel-art-editor/): Draw pixel art in the browser with a palette, flood fill, and PNG export.
- [Posterize / Color-Reduce Image Tool - Online Posterizer](https://toolcroft.com/posterize-tool/): Reduce the number of colors in an image to create a bold posterized look. Choose between 2 and 8 color levels per channel, preview the result instantly, and download as PNG.
- [QR Code Customizer - Custom Color QR Generator](https://toolcroft.com/qr-code-customizer/): Customize QR codes with color, size, error correction, and a local center logo. Preview live and download PNG or logo-free SVG.
- [Signature Pad - Draw & Download Signature](https://toolcroft.com/signature-pad/): Draw your signature with a mouse or touchscreen. Download as a transparent PNG or SVG. Adjust stroke color and width.
- [SVG Path Editor / Previewer - Live Path Visualizer](https://toolcroft.com/svg-path-editor/): Paste an SVG path `d` attribute and instantly see a live SVG preview. Translate and scale the path, inspect parsed commands, and copy the modified path.
- [SVG Sprite Generator - Combine SVG Icons](https://toolcroft.com/svg-sprite-generator/): Upload multiple SVG files and combine them into a single SVG sprite sheet with <symbol> elements. Download the sprite sheet and get <use> snippets for each icon.

### PDF Tools
- [Image to PDF Converter](https://toolcroft.com/image-to-pdf/): Combine multiple images into a single PDF in your browser. Choose page size, orientation, and margin. Your files never leave your device.
- [PDF Metadata Editor - Edit PDF Title, Author & Properties Online](https://toolcroft.com/pdf-metadata-editor/): View and edit the title, author, subject, keywords, and other metadata fields of any PDF file directly in your browser.
- [PDF Page Organizer - Merge, Split, Reorder & Rotate PDFs Online](https://toolcroft.com/pdf-page-organizer/): Merge, split, extract, reorder, rotate, and delete PDF pages in one visual tool - entirely in your browser. Your files never leave your device.
- [PDF Stamp - Add Watermarks & Page Numbers to PDFs Online](https://toolcroft.com/pdf-stamp/): Add text watermarks and page numbers to a PDF in one pass, with a live preview - entirely in your browser. Files never leave your device.
- [PDF to Image Converter](https://toolcroft.com/pdf-to-image/): Convert PDF pages to PNG or JPEG images in your browser. Choose DPI, select pages, and download as a ZIP. No uploads, no accounts.
- [PDF to Text - Extract Text from Any PDF, with OCR for Scans](https://toolcroft.com/pdf-to-text/): Extract text from any PDF in your browser. Instant for digital PDFs; built-in OCR handles scanned pages. Output text, Markdown, or a searchable PDF.

### Color Tools
- [Border Radius Generator](https://toolcroft.com/border-radius-generator/): Set individual corner radii with sliders and see a live preview. Copy the CSS shorthand.
- [Color Blindness Simulator](https://toolcroft.com/color-blindness-simulator/): Simulate how colors and images appear under protanopia, deuteranopia, tritanopia, and achromatopsia.
- [Color Contrast Checker (WCAG)](https://toolcroft.com/color-contrast-checker/): Check WCAG 2.x contrast ratio between any two colors. Instant pass/fail for AA and AAA levels across normal text, large text, and UI components.
- [Color Hue Vision Test - FM100-Style Hue Discrimination](https://toolcroft.com/hue-test/): Test your colour vision and hue discrimination with an FM100-inspired online test. Arrange coloured chips in order of hue - the lower your score, the better your colour perception.
- [Color Mixer - Blend Two Colors Together](https://toolcroft.com/color-mixer/): Blend two colors with RGB, short-arc HSL, or pigment-style mixing. Adjust the ratio, preview mode-based samples, and copy the result as hex, RGB, or HSL.
- [Color Name Finder - Find the Nearest CSS Color Name](https://toolcroft.com/color-name-finder/): Enter any hex, RGB, or CSS color and instantly find its exact or nearest CSS named color. See the 5 closest matches with swatches. Free, browser-only.
- [Color Palette Generator](https://toolcroft.com/color-palette-generator/): Generate harmonic color palettes: complementary, analogous, triadic, tetradic, monochromatic, and split-complementary. Export as CSS variables or JSON.
- [Color Picker & HEX RGB HSL Converter](https://toolcroft.com/color-converter/): Pick a color visually or type any format: HEX, RGB, HSL, HSV, or CMYK. See all formats at once with copy buttons. Find the closest CSS named color and Tailwind shade. All processing is local.
- [Color Reference Library - Browse & Search Named Colors](https://toolcroft.com/color-reference-library/): Browse 130+ named CSS colors with hex, RGB, and HSL values. Filter by color group or search by name.
- [Color Temperature Converter - Kelvin to RGB Color](https://toolcroft.com/color-temperature-converter/): Convert color temperature in Kelvin to an RGB color value. Visualize warm candlelight, daylight, and cool sky temperatures.
- [CSS Animation Generator](https://toolcroft.com/css-animation-generator/): Build CSS @keyframes animations visually and copy the generated CSS code.
- [CSS Box Shadow Generator](https://toolcroft.com/box-shadow-generator/): Visually build CSS box-shadow declarations with multiple layers. Adjust offsets, blur, spread, color, and opacity.
- [CSS clip-path Generator](https://toolcroft.com/clip-path-generator/): Generate CSS clip-path polygon values with a live visual editor. Copy the CSS instantly.
- [CSS Filter Generator - Visual Filter Builder](https://toolcroft.com/css-filter-generator/): Visually adjust blur, brightness, contrast, grayscale, hue-rotate, invert, opacity, saturate, and sepia to generate a ready-to-use CSS filter property.
- [CSS Gradient Generator](https://toolcroft.com/css-gradient-generator/): Build CSS linear, radial, and conic gradients visually. Adjust color stops, angle, and position, then copy the ready-to-use CSS code.
- [CSS Grid Generator](https://toolcroft.com/css-grid-generator/): Visually build CSS grid layouts. Define rows, columns, and gaps, then copy the generated CSS.
- [CSS Loader Generator](https://toolcroft.com/css-loader-generator/): Generate pure-CSS loading spinners, dots, bars, and more. Copy the HTML and CSS.
- [CSS Scroll Snap Playground - Interactive Demo](https://toolcroft.com/scroll-playground/): Experiment with CSS scroll-snap-type, scroll-snap-align, and scroll-behavior in an interactive playground. Copy the generated CSS for your project.
- [CSS Scrollbar Styler - Custom Scrollbar Generator](https://toolcroft.com/scrollbar-generator/): Design a custom CSS scrollbar with live preview. Control width, track color, thumb color, hover color, and border-radius. Generates webkit and Firefox CSS ready to copy.
- [CSS Toggle Switch Generator - Custom On/Off Switch](https://toolcroft.com/toggle-switch-generator/): Design a custom CSS toggle switch with live preview. Set track colors, thumb size, animation speed, and labels. Generates ready-to-use HTML and CSS with no JavaScript required.
- [Cubic Bezier Editor](https://toolcroft.com/cubic-bezier-editor/): Drag control points to craft a cubic-bezier() curve and copy it for CSS transitions and animations.
- [Glassmorphism Generator](https://toolcroft.com/glassmorphism-generator/): Create glassmorphism CSS effects with blur, opacity, and saturation controls. Copy the CSS.
- [Mesh Gradient Generator - CSS Gradient Builder](https://toolcroft.com/mesh-gradient-generator/): Create beautiful mesh, conic, radial, and linear CSS gradients in your browser. Pick colors, adjust positions, and copy the generated CSS.
- [Neumorphism Generator](https://toolcroft.com/neumorphism-generator/): Generate neumorphic CSS box-shadow effects with live preview. Copy the CSS.
- [SVG Blob Generator](https://toolcroft.com/svg-blob-generator/): Generate random organic blob shapes as SVG or CSS clip-path. Copy for use in designs.
- [SVG Pattern Generator](https://toolcroft.com/svg-pattern-generator/): Generate repeating SVG patterns (dots, lines, grids, etc.) as background tiles. Copy the SVG.
- [Tints & Shades Generator - Color Scale Tool](https://toolcroft.com/tints-shades-generator/): Generate tints (lighter) and shades (darker) of any color. Copy hex codes for full color scales. Perfect for design systems and CSS custom properties.

### Audio & Music
- [Audio File Size Calculator - Uncompressed & Compressed](https://toolcroft.com/audio-file-size-calculator/): Estimate audio file size for WAV/AIFF (uncompressed) and MP3/AAC/OGG (compressed). Enter sample rate, bit depth, channels, and duration to get file size in MB.
- [Chord Finder - Notes in Any Musical Chord](https://toolcroft.com/chord-finder/): Find the notes in any musical chord: major, minor, diminished, augmented, 7th, 9th, and more. Select root note and chord quality to see intervals and all enharmonic spellings.
- [Chord Progression Generator - Online Chord Progressions](https://toolcroft.com/chord-progression-generator/): Build diatonic triad progressions in 12 keys and six modes. See quality-aware Roman numerals, set playback from 40–200 BPM, and audition chords.
- [Note Frequency Calculator - Musical Note to Hz Converter](https://toolcroft.com/note-frequency-calculator/): Convert between note names (C4, A4, Bb3), MIDI note numbers, and frequencies in Hz. Supports A440 and A432 tuning. Shows octave, cents deviation, and wavelength.
- [Online Instrument Tuner - Browser Mic Pitch Detection](https://toolcroft.com/instrument-tuner/): Tune any instrument using your browser microphone. Detects pitch via autocorrelation, displays the nearest note name and cents deviation. Nothing is uploaded.
- [Online Metronome - Free BPM Metronome with Click Track](https://toolcroft.com/metronome/): Free online metronome with adjustable BPM, beat counts, and subdivisions. Start/stop with a click. Runs in your browser using Web Audio API, no install required.
- [Online Tone Generator - Sine Wave & Audio Frequency Generator](https://toolcroft.com/tone-generator/): Generate browser tones from 20 Hz to 20 kHz. Choose sine, square, sawtooth, or triangle, set a note or frequency, and play sound locally in your browser.
- [Subwoofer Box Calculator - Port Length & Box Volume](https://toolcroft.com/subwoofer-box-calculator/): Calculate ported subwoofer box port length from enclosure volume, tuning frequency, and port diameter. Also checks box volume and port velocity recommendations.
- [Tap Tempo - Online BPM Counter & Metronome](https://toolcroft.com/tap-tempo/): Tap the button or press Space to measure BPM in real time. Displays rolling average, rejects outliers, and shows milliseconds per beat and musical note values.
- [Video Audio Extractor - Extract Audio from Video](https://toolcroft.com/video-audio-extractor/): Extract audio from video files in your browser as WAV, Opus, or AAC. Optionally trim volume-based silence. Private, free, and no uploads.

### Camera, Mic & Media
- [Audio Oscilloscope - Visualize Sound Waveforms Online](https://toolcroft.com/oscilloscope/): View live microphone waveforms locally with adjustable time and normalized amplitude scales, edge triggering, and a readable 10×8 grid.
- [Audio Spectrum Analyzer - Frequency Visualizer Online](https://toolcroft.com/spectrum-analyzer/): Visualize the frequency spectrum of your microphone in real time using a live bar chart (FFT). Useful for audio analysis, room acoustics, and sound experiments.
- [Barcode Scanner - Scan 1D/2D Barcodes with Camera](https://toolcroft.com/barcode-scanner/): Scan EAN-13, UPC-A, Code 128, Code 39, and other barcodes with your camera or from an uploaded image. All processing happens locally in your browser.
- [Binaural Beats Generator - Focus, Relax & Sleep Tones](https://toolcroft.com/binaural-beats/): Generate binaural beats for focus, relaxation, meditation, or sleep. Choose your carrier frequency and beat frequency. Use with headphones for best results.
- [Camera Heart Rate Monitor - PPG Pulse Estimate](https://toolcroft.com/camera-heart-rate/): Estimate your pulse by placing your fingertip over the camera lens. Uses photoplethysmography (PPG) color change analysis. For informational use only - not a medical device.
- [Camera Light / EV Meter - Estimate Lux & Exposure from Webcam](https://toolcroft.com/light-meter/): Estimate the lighting level in your scene using your webcam. Displays average luminance, approximate EV (exposure value), and a recommended exposure setting. Runs in your browser.
- [Color Picker from Camera - Eyedropper via Webcam](https://toolcroft.com/camera-color-picker/): Point your camera at any surface and click to pick the color. Get the HEX, RGB, and HSL values instantly. All processing is done locally in your browser.
- [Decibel Meter - Sound Level Meter Online](https://toolcroft.com/decibel-meter/): Measure the sound level around you with your microphone. See real-time dBFS readings, peak level, and average. All audio processing is local - nothing is recorded or uploaded.
- [Document Scanner to PDF - Scan with Camera Online](https://toolcroft.com/document-scanner/): Use your camera to scan documents and save them as PDFs in the browser. Capture multiple pages and download the combined PDF. Nothing is uploaded.
- [Drum Machine / Beat Sequencer - Online Browser Drums](https://toolcroft.com/drum-machine/): Create and play drum patterns in your browser with this 16-step beat sequencer. Kick, snare, hi-hat and more. Adjust BPM and apply presets.
- [DTMF Tone Generator - Phone Keypad Tones Online](https://toolcroft.com/dtmf-tone-generator/): Generate DTMF dual-tone multi-frequency signals for any phone keypad symbol (0-9, *, #, A-D). Click keys to dial and hear the tones in your browser.
- [Face Landmark Detector - Real-Time Face Detection in Browser](https://toolcroft.com/face-landmark-detector/): Detect faces in your webcam feed in real time using the browser's built-in Face Detection API. Draws bounding boxes locally - no images are uploaded.
- [Green Screen / Chroma Key Tool - Webcam Background Remover](https://toolcroft.com/chroma-key-tool/): Remove your webcam background using chroma key (green screen) technology. Choose a key color, adjust the threshold, and replace the background with any color or image - all in your browser.
- [Guitar Chord Diagram Viewer - Common Guitar Chords](https://toolcroft.com/guitar-chord-diagram/): Look up guitar chord fingerings with SVG fretboard diagrams. Covers major, minor, and 7th chords. No download needed.
- [Image Steganography - Hide Text in an Image](https://toolcroft.com/steganography-tool/): Hide a secret text message inside any PNG image using LSB steganography, or reveal hidden messages from an image. All processing runs locally in your browser.
- [Interactive Circle of Fifths - Music Theory Reference](https://toolcroft.com/circle-of-fifths/): Explore the circle of fifths interactively. Click any key to see its key signature, relative minor, and diatonic chords. Essential music theory reference.
- [Isochronic Tones Generator - Single-Tone Pulsing Brain Entrainment](https://toolcroft.com/isochronic-tones/): Generate isochronic tones for focus, relaxation, or sleep. Unlike binaural beats, isochronic tones work without headphones. Choose a brainwave preset or customize the carrier and pulse frequencies.
- [Live ASCII Art Camera - Webcam to ASCII in Real Time](https://toolcroft.com/ascii-art-camera/): Turn your webcam feed into real-time ASCII art. Adjust the character density, invert colors, and copy or download the ASCII output. Runs entirely in your browser.
- [Live BPM / Tempo Detector - Beat Detection from Microphone](https://toolcroft.com/bpm-detector/): Detect the tempo (BPM) of music or rhythm in real time using your microphone. Uses onset energy detection to estimate beats per minute. No upload required - runs entirely in your browser.
- [Microphone Test - Check Your Mic Online](https://toolcroft.com/microphone-test/): Test your microphone in the browser. See a live volume meter, waveform, and confirm audio input is working. No audio is recorded or uploaded.
- [Music Scale Visualizer & Reference - Guitar Fretboard & Piano](https://toolcroft.com/scale-visualizer/): Visualize any music scale on a guitar fretboard and piano keyboard. Supports major, minor, pentatonic, blues, modes and more for all 12 roots.
- [Online Hearing Test - Check Your Frequency Hearing Range](https://toolcroft.com/hearing-test/): Test your hearing range by playing tones from 20 Hz to 20 000 Hz. Find the highest and lowest frequencies you can hear. For informational use only - not a medical device.
- [Photo Filters & Effects Studio - Vintage, Sketch, Cartoon & More](https://toolcroft.com/photo-filters/): Apply vintage, sepia, grayscale, sketch, cartoon, and other photo filters to any image in your browser. No upload required - all processing is done locally.
- [Pixel Sorter / Glitch Art Generator - Pixel Sorting Online](https://toolcroft.com/pixel-sorter/): Create glitch art by sorting pixels in your image by brightness, hue, or color channel. Adjust threshold and direction for different visual effects. Runs entirely in your browser.
- [Portrait Blur - Webcam Background Blur](https://toolcroft.com/virtual-background/): Blur your webcam background in real time without any app installation. Adjust blur strength and portrait area. All processing happens locally in your browser.
- [Posture Reminder - Webcam Slouch Alert](https://toolcroft.com/posture-reminder/): Use your webcam to monitor your posture and get reminders when you slouch. The tool takes a baseline photo of your upright posture and alerts you when frame differences indicate significant movement.
- [Pupillary Distance (PD) Measurer - Camera Estimate](https://toolcroft.com/pupillary-distance-measurer/): Estimate your pupillary distance (PD) using your webcam and a credit card as a scale reference. Click on your pupils and card edges to measure. For informational use - not a prescription tool.
- [QR Code Scanner - Scan with Camera or Upload Image](https://toolcroft.com/qr-code-scanner/): Scan QR codes using your camera or decode from an uploaded image. Detects URLs, Wi-Fi, vCards, and more. 100% client-side, nothing uploaded.
- [Screen Color Eyedropper - Pick Any Color from Your Screen](https://toolcroft.com/screen-eyedropper/): Pick any color from anywhere on your screen using the browser EyeDropper API. Get instant HEX, RGB, and HSL values. No extensions required.
- [Screen Recorder - Record Your Screen in the Browser](https://toolcroft.com/screen-recorder/): Record your entire screen, a window, or a browser tab directly in the browser. Download as WebM. No installs, no uploads, everything stays on your device.
- [Speaker Test - Check Left & Right Audio Channels](https://toolcroft.com/speaker-test/): Test your speakers or headphones by playing tones through the left, right, or both channels. Check stereo separation and frequency response.
- [Speech to Text Dictation - Voice to Text Online](https://toolcroft.com/speech-to-text/): Dictate with your browser's Web Speech API, then edit, copy, or download your transcript. Chrome and Edge may send audio to their speech services.
- [Stop-Motion Animation Studio - Webcam Frame Capture](https://toolcroft.com/stop-motion-studio/): Create stop-motion animations using your webcam. Capture frames one by one, preview the playback, and manage your frame sequence. Runs entirely in your browser.
- [Teleprompter - Free Online Browser Teleprompter](https://toolcroft.com/teleprompter/): A free browser teleprompter that scrolls your script at a chosen speed and font size, with mirror and full-screen modes for recording or presenting.
- [Tilt-Shift / Miniature Effect Generator - Make Photos Look Like Models](https://toolcroft.com/tilt-shift-effect/): Create a tilt-shift miniature effect from any photo. Keep a horizontal band in focus and blur the rest to make real scenes look like tiny scale models. Runs locally in your browser.
- [Time-Lapse Webcam Recorder - Interval Capture in Browser](https://toolcroft.com/time-lapse-recorder/): Record time-lapse footage directly in your browser using your webcam. Set the capture interval, watch the frame count grow, and download the captured frames.
- [Tinnitus Notch / Masker Tone Tool - Sound Therapy Aid](https://toolcroft.com/tinnitus-masker/): Generate notched noise with an uncalibrated frequency matcher for informational or relaxation use. Not a hearing test or tinnitus treatment.
- [Virtual Piano Keyboard - Play Piano in the Browser](https://toolcroft.com/virtual-piano/): Play a virtual piano keyboard directly in your browser using your mouse or QWERTY keyboard. No plugins or downloads required. Great for learning notes.
- [Vocal Range Finder - Sing Your Note Range with Mic Pitch Detection](https://toolcroft.com/vocal-range-finder/): Discover your singing vocal range using your microphone. Sing your lowest and highest notes - the tool detects the pitch and displays your note range and voice classification.
- [Voice Changer - Pitch Shift Your Voice in the Browser](https://toolcroft.com/voice-changer/): Record your voice and play it back at a different pitch - chipmunk, deep monster, or anything in between. No upload needed, runs entirely in your browser.
- [Voice Recorder - Record Audio and Download as WAV](https://toolcroft.com/voice-recorder/): Record audio from your microphone in the browser and download the recording as a WAV file. No account, no upload, nothing stored on a server.
- [Webcam Mirror - Use Your Camera as a Mirror Online](https://toolcroft.com/webcam-mirror/): Use your webcam as a live mirror in your browser. Flip horizontally, adjust zoom, and go full-screen. No video is recorded or uploaded.
- [Webcam Motion Detector - Detect Movement Online](https://toolcroft.com/motion-detector/): Detect motion in real time using your webcam. Visualizes movement regions and triggers an alert. All video processing is local - nothing is recorded or uploaded.
- [Webcam Photo Booth - Take Photos with Filters & Effects](https://toolcroft.com/photo-booth/): Take photos with your webcam and apply fun filters and effects: grayscale, sepia, invert, warm, cool, and more. Download your photos instantly. Nothing is uploaded.
- [Webcam Test - Check Your Camera Online](https://toolcroft.com/webcam-test/): Test your webcam quickly and privately. See a live preview, check resolution, frame rate, and switch between connected cameras. Nothing is recorded or uploaded.
- [Webcam Video Recorder - Record Video in Your Browser](https://toolcroft.com/webcam-recorder/): Record video from your webcam directly in the browser using MediaRecorder. Preview the recording and download as WebM. No uploads, no account needed.
- [White, Pink & Brown Noise Generator - Sleep & Focus Sounds](https://toolcroft.com/noise-generator/): Generate white, pink, or brown noise for sleep, focus, or tinnitus relief. Adjust volume and choose noise color. Pure browser audio - no downloads needed.

## Math & Science
### Math Calculators
- [3D Shape Calculator - Volume & Surface Area](https://toolcroft.com/3d-shape-calculator/): Calculate volume and surface area for 3D shapes including sphere, cube, rectangular prism, cylinder, cone, and regular tetrahedron.
- [Big Number Calculator - Arbitrary Precision Integers](https://toolcroft.com/big-number-calculator/): Perform exact arithmetic on integers of any size with no floating-point rounding. Supports addition, subtraction, multiplication, division, modulo, power, GCD, LCM, and factorial up to 10 000!.
- [Birthday Paradox Calculator - Group Size & Collision Probability](https://toolcroft.com/birthday-paradox-calculator/): Calculate the probability that at least two people in a group share a birthday. See why just 23 people gives a 50% chance and visualize the probability curve.
- [Bitwise Calculator - AND, OR, XOR, NOT, Shift Operations](https://toolcroft.com/bitwise-calculator/): Perform bitwise AND, OR, XOR, NOT, left shift, and right shift operations with 32-bit visualization. Input decimal, hex (0x), or binary (0b) values.
- [Circle Calculator - Area, Circumference, Arc Length & Sector](https://toolcroft.com/circle-calculator/): Calculate circle area, circumference, diameter, arc length, sector area, chord length, and segment area. Enter any one property and get all others instantly.
- [Collatz Conjecture Sequence Visualizer - 3n+1 Problem](https://toolcroft.com/collatz-visualizer/): Visualize the Collatz sequence for any positive integer. See the hailstone trajectory, step count, and peak value. Explore the famous 3n+1 conjecture.
- [Complex Number Calculator - Add, Multiply, Modulus & More](https://toolcroft.com/complex-number-calculator/): Perform arithmetic on complex numbers: add, subtract, multiply, divide, raise to a power, square root, modulus, conjugate, inverse, exp, and ln. Step-by-step shown.
- [Confidence Interval Calculator](https://toolcroft.com/confidence-interval-calculator/): Calculate confidence intervals at 90%, 95%, or 99% using z or t distributions.
- [Continued Fraction Converter - Best Rational Approximations](https://toolcroft.com/continued-fraction-converter/): Convert any decimal or fraction to its continued fraction representation [a₀; a₁, a₂, …]. Shows all convergents, which are the best rational approximations to any real number.
- [Conway's Game of Life - Cellular Automaton Simulator](https://toolcroft.com/game-of-life/): Simulate Conway's Game of Life in your browser. Start from a random seed, draw your own pattern, or load a classic preset like the glider. Watch evolution unfold.
- [Decimal to Fraction Converter - Terminating & Repeating](https://toolcroft.com/decimal-to-fraction/): Convert any decimal to a simplified fraction. Supports terminating decimals, repeating decimals (e.g. 0.(3) = 1/3), and mixed-number form.
- [Derivative Calculator - Symbolic Differentiation](https://toolcroft.com/derivative-calculator/): Calculate the derivative of any polynomial, trigonometric, exponential, or logarithmic expression. Supports chain rule, product rule, and quotient rule with step-by-step output.
- [Dice Probability Calculator - RPG Dice Odds & Distribution](https://toolcroft.com/dice-probability-calculator/): Calculate the full probability distribution for any dice roll in XdY+modifier notation. See the chance of rolling at least N, the mean, standard deviation, and a bar chart of outcomes.
- [Distance Formula Calculator - 2D and 3D Distance Between Two Points](https://toolcroft.com/distance-formula/): Calculate the distance between two points in 2D or 3D space. Shows the substituted distance formula with step-by-step work.
- [Ellipse Calculator - Area, Perimeter, Eccentricity & Foci](https://toolcroft.com/ellipse-calculator/): Calculate ellipse area, perimeter (Ramanujan approximation), eccentricity, linear eccentricity, semi-latus rectum, and focal distance.
- [Fibonacci Sequence Generator - First N, Nth Term & Range](https://toolcroft.com/fibonacci-generator/): Generate Fibonacci numbers three ways: list the first N terms, look up the exact Nth Fibonacci number (up to F(10,000) using BigInt), or find all Fibonacci numbers within a range.
- [Final Grade Calculator](https://toolcroft.com/final-grade-calculator/): Find out what score you need on your final exam to achieve your desired course grade.
- [Fourier Series Visualizer - Square, Sawtooth & Triangle Waves](https://toolcroft.com/fourier-visualizer/): See how adding sine wave harmonics builds square, sawtooth, and triangle waves. Animate the rotating phasor vectors and watch the Fourier approximation improve with more terms.
- [Fraction Calculator](https://toolcroft.com/fraction-calculator/): Add, subtract, multiply, and divide fractions or mixed numbers. Shows simplified result, mixed-number form, and decimal equivalent.
- [Function Grapher - Interactive f(x) Graph Plotter](https://toolcroft.com/function-grapher/): Plot any mathematical function f(x) interactively in your browser. Supports trig, logarithms, exponents, and more. Pan and zoom with mouse or touch.
- [GCD & LCM Calculator - Greatest Common Divisor & Least Common Multiple](https://toolcroft.com/gcd-lcm-calculator/): Calculate the greatest common divisor (GCD) and least common multiple (LCM) of up to 50 integers. Shows step-by-step Euclidean algorithm work and prime factorization.
- [GPA Calculator](https://toolcroft.com/gpa-calculator/): Calculate your cumulative GPA from course grades and credit hours. Supports 4.0, 4.5 (honors), and 5.0 (AP) scales. Saves automatically.
- [Integral Calculator - Symbolic & Definite Integration](https://toolcroft.com/integral-calculator/): Calculate indefinite and definite integrals instantly. Supports polynomials, sin, cos, exp, ln, and sqrt with step-by-step antiderivatives. Definite integrals evaluated numerically for complex expressions.
- [Linear Regression Calculator - Slope, Intercept & R^2](https://toolcroft.com/linear-regression-calculator/): Compute least-squares linear regression for a set of (x, y) data points. Get the slope, intercept, R^2 coefficient of determination, Pearson correlation, and a scatter plot with the best-fit line.
- [Linear System Solver - 2×2 and 3×3 Equations](https://toolcroft.com/linear-system-solver/): Solve systems of 2 or 3 linear equations with step-by-step Gaussian elimination. Detects unique solutions, no solution (inconsistent), and infinite solutions (dependent).
- [Logarithm & Exponent Calculator](https://toolcroft.com/logarithm-calculator/): Calculate log base b, natural log, log₁₀, powers, and eˣ quickly.
- [Magic Square Generator - Odd & Even Order Magic Squares](https://toolcroft.com/magic-square-generator/): Generate magic squares where every row, column, and diagonal sums to the same magic constant. Supports odd orders (3, 5, 7, 9, 11) and doubly-even orders (4, 8, 12).
- [Mandelbrot & Julia Set Fractal Explorer - Interactive Canvas](https://toolcroft.com/fractal-explorer/): Explore the Mandelbrot set and Julia sets interactively in your browser. Zoom in to reveal infinite fractal detail. Switch between Mandelbrot and Julia modes.
- [Matrix Calculator - Add, Multiply, Inverse, Determinant & More](https://toolcroft.com/matrix-calculator/): Perform matrix operations online: addition, subtraction, multiplication, transpose, determinant, inverse, rank, and trace. Up to 10×10 matrices with step-by-step solutions.
- [Midpoint & Distance Calculator - Two-Point Formula](https://toolcroft.com/midpoint-calculator/): Find the midpoint, distance, and slope between two points (x₁,y₁) and (x₂,y₂) instantly with step-by-step solutions.
- [Modular Arithmetic Calculator - Mod, Power, Inverse & CRT](https://toolcroft.com/modular-arithmetic-calculator/): Perform modular arithmetic operations: basic mod, fast modular exponentiation, modular inverse (extended Euclidean), Bézout coefficients, and Chinese Remainder Theorem.
- [Number Theory Explorer - Perfect, Abundant & Amicable Numbers](https://toolcroft.com/number-theory-explorer/): Explore number theory concepts: perfect numbers, abundant numbers, amicable pairs, prime factorization, and divisors - all calculated instantly in your browser.
- [Number to Words Converter - Cardinal, Ordinal & Check Writing](https://toolcroft.com/number-to-words/): Convert any number to its English word form: cardinal (one thousand), ordinal (one thousandth), or check-writing format. Supports numbers up to 10^21 with decimals.
- [Ohm's Law Calculator - Voltage, Current, Resistance & Power](https://toolcroft.com/ohms-law-calculator/): Solve V=IR and P=VI for any two unknowns. Enter any two of voltage, current, resistance, or power to compute the other two.
- [Pascal's Triangle Generator - Rows, Binomial Coefficients](https://toolcroft.com/pascals-triangle/): Generate Pascal's Triangle up to 25 rows. Highlights diagonals (natural numbers, triangular numbers, Fibonacci), shows binomial coefficients, and lets you download the table.
- [Percentage Calculator](https://toolcroft.com/percentage-calculator/): Calculate percentages four ways: find a percentage of a number, find what percent X is of Y, find the base value, or calculate percent change.
- [Permutations & Combinations Calculator - nPr and nCr](https://toolcroft.com/permutations-combinations/): Calculate permutations P(n,r) and combinations C(n,r) with step-by-step factorial work. Uses BigInt for large values.
- [Poker Odds Calculator - 5-Card Hand Probabilities](https://toolcroft.com/poker-odds-calculator/): Look up the exact probability of every 5-card poker hand (Royal Flush through High Card) from a standard 52-card deck. Also classify any 5-card hand you enter.
- [Polygon Calculator - Area, Perimeter, Angles & Diagonals](https://toolcroft.com/polygon-calculator/): Calculate properties of any regular polygon: area, perimeter, interior and exterior angles, number of diagonals, inradius, and circumradius.
- [Polynomial Solver - Roots of Degree 2, 3, and 4](https://toolcroft.com/polynomial-solver/): Solve polynomial equations of degree 2, 3, or 4 instantly. Enter coefficients to find all real and complex roots using exact algebraic formulas (quadratic, Cardano, Ferrari).
- [Prime Number Tools - Primality Test, Factorization & Sieve](https://toolcroft.com/prime-tools/): Three prime number tools in one: test if a number is prime, find its prime factorization, and generate all primes up to 10 million with the Sieve of Eratosthenes.
- [Probability Calculator - Bayes, Conditional, And/Or](https://toolcroft.com/probability-calculator/): Calculate single, complement, union, intersection, conditional, and Bayes probabilities with formulas, fractions, decimals, percentages, and event scenarios.
- [Probability Distribution Calculator - Normal, Binomial & Poisson](https://toolcroft.com/distribution-calculator/): Calculate PDF, PMF, and CDF values for the Normal, Binomial, and Poisson probability distributions. Visualize the distribution curve instantly in your browser.
- [Pythagorean Theorem Calculator - Find Side or Check Triple](https://toolcroft.com/pythagorean-calculator/): Use the Pythagorean theorem (a² + b² = c²) to find the hypotenuse or a missing leg, or check whether three numbers form a Pythagorean triple.
- [Quadratic Equation Solver](https://toolcroft.com/quadratic-solver/): Solve ax² + bx + c = 0. Shows real or complex roots, discriminant, vertex, and step-by-step solution.
- [Ratio & Proportion Solver](https://toolcroft.com/ratio-calculator/): Simplify ratios and solve proportions (A:B = C:?) for the missing value.
- [Right Triangle Calculator - Find Missing Sides & Angles](https://toolcroft.com/right-triangle-calculator/): Calculate any unknown side or angle of a right triangle. Enter any two values and get the complete solution using the Pythagorean theorem and trigonometry.
- [Roman Numeral Converter - Arabic ↔ Roman Numerals](https://toolcroft.com/roman-numeral-converter/): Convert between Arabic numbers and Roman numerals instantly. Supports 1 to 3,999,999. Runs entirely in your browser.
- [Scientific Calculator - sin, cos, log, sqrt & More](https://toolcroft.com/scientific-calculator/): Free online scientific calculator with trig functions, logarithms, exponents, factorials, and constants π and e. Degrees and radians. History panel.
- [Scientific Notation Converter - Standard, Scientific, Engineering & E-Notation](https://toolcroft.com/scientific-notation-converter/): Convert any number between standard decimal, scientific notation (a × 10^b), engineering notation, and E-notation. Set significant figures and copy any form instantly.
- [Sequence Detector - Identify Number Patterns & Predict Next Terms](https://toolcroft.com/sequence-detector/): Paste a number sequence and instantly identify its pattern: arithmetic, geometric, Fibonacci, squares, cubes, triangular, primes, and more. Predicts the next 5 terms with the formula.
- [Significant Figures Calculator](https://toolcroft.com/sig-fig-calculator/): Count the significant figures in a number and round any value to N significant figures.
- [Slope Calculator - Find Slope, Equation & Distance Between Two Points](https://toolcroft.com/slope-calculator/): Calculate the slope, y-intercept, line equation, distance, and angle between two points. Shows slope-intercept form y = mx + b instantly.
- [Spirograph & Lissajous Curve Generator - Geometric Art Visualizer](https://toolcroft.com/spirograph/): Generate beautiful spirograph (hypotrochoid) and Lissajous curves in your browser. Adjust inner/outer circle radii, pen distance, and frequency ratios to create endless geometric patterns.
- [Statistics Calculator](https://toolcroft.com/statistics-calculator/): Calculate mean, median, mode, standard deviation, variance, quartiles, and IQR from any list of numbers.
- [Tower of Hanoi - Step-by-Step Puzzle Solver & Visualizer](https://toolcroft.com/tower-of-hanoi/): Watch the Tower of Hanoi puzzle solve itself step by step with animated discs. Choose up to 8 discs, auto-play or step manually, and learn the recursive algorithm.
- [Triangle Solver - Solve Any Triangle (SSS, SAS, ASA, AAS, SSA)](https://toolcroft.com/triangle-solver/): Solve any triangle by entering three known values. Supports SSS, SAS, ASA, AAS, and the ambiguous SSA case. Shows all sides, angles, area, and perimeter.
- [Trigonometry Solver](https://toolcroft.com/trig-calculator/): Calculate sin, cos, tan, inverse trig, and hyperbolic functions in degrees or radians.
- [Truth Table Generator](https://toolcroft.com/truth-table-generator/): Generate truth tables for any Boolean expression using AND, OR, NOT, XOR, NAND, NOR, and XNOR operators.
- [Unit Circle Reference](https://toolcroft.com/unit-circle/): Interactive unit circle reference showing sin, cos, and tan values for all 17 standard angles.
- [Vector Calculator - Add, Dot Product, Cross Product & More](https://toolcroft.com/vector-calculator/): Perform 2D and 3D vector operations: addition, subtraction, dot product, cross product, magnitude, normalization, and angle between vectors. Step-by-step solutions shown.
- [Venn Diagram Generator - Set Operations Visualizer (2 or 3 Sets)](https://toolcroft.com/venn-diagram/): Create interactive Venn diagrams for 2 or 3 sets. Enter items, see union, intersection, difference, and symmetric difference calculated instantly with a visual SVG diagram.
- [Z-Score Calculator](https://toolcroft.com/z-score-calculator/): Calculate the z-score and percentile for any value given a mean and standard deviation.

### Science & Engineering
- [Battery Life Calculator - Runtime from Capacity & Current](https://toolcroft.com/battery-life-calculator/): Estimate battery runtime from capacity (mAh) and current draw (mA). Add an efficiency factor (%) and optionally include self-discharge rate for accurate projections.
- [BTU / AC Size Calculator - Room Cooling Load](https://toolcroft.com/btu-calculator/): Calculate the BTU cooling capacity needed for a room based on dimensions, insulation, sun exposure, and occupancy.
- [Capacitor Code Calculator - Decode & Encode Capacitor Codes](https://toolcroft.com/capacitor-code-calculator/): Decode 3-digit ceramic capacitor codes (like 104 = 100 nF) to picofarads, nanofarads, and microfarads. Also convert a capacitance value back to its 3-digit code.
- [Carbon Footprint Calculator - Estimate Your Annual CO₂ Emissions](https://toolcroft.com/carbon-footprint-calculator/): Estimate your personal annual CO₂e emissions from transport, home energy, diet, and shopping. See a breakdown by category and get personalised reduction tips.
- [Decibel Calculator - dB Conversion for Voltage, Power & SPL](https://toolcroft.com/decibel-calculator/): Convert between decibels and voltage or power ratios. Calculate sound pressure level (dB SPL) from pressure in Pascals. Convert dB to amplitude ratios and back.
- [Density Calculator - Mass, Volume & Density Solver](https://toolcroft.com/density-calculator/): Calculate density, mass, or volume using D = m/V. Supports metric and imperial units. Shows the triangle relationship and common material densities for reference.
- [Doppler Effect Calculator - Observed Frequency & Pitch Shift](https://toolcroft.com/doppler-calculator/): Calculate the observed frequency of a moving sound source using the Doppler effect formula. Enter source frequency, velocities, and wave speed to compute the perceived frequency and pitch shift in semitones.
- [Free Fall Calculator - Distance, Velocity & Time](https://toolcroft.com/free-fall-calculator/): Calculate free-fall distance, velocity, or time using h=½gt² and v=gt. Supports metric (m/s²) and imperial (ft/s²). Ignores air resistance.
- [Half-Life Calculator - Radioactive Decay & Remaining Amount](https://toolcroft.com/half-life-calculator/): Calculate remaining quantity, elapsed time, or half-life for radioactive decay using N(t)=N₀×(½)^(t/t½). Supports any initial quantity and time unit.
- [Hooke's Law Calculator - F = kx Spring Force](https://toolcroft.com/hookes-law-calculator/): Solve Hooke's Law F = kx for force, spring constant, or extension. Also calculates elastic potential energy stored in the spring (U = 1/2kx^2).
- [Ideal Gas Law Calculator - PV = nRT Solver](https://toolcroft.com/ideal-gas-law-calculator/): Solve PV=nRT for any unknown variable. Supports atm, Pa, kPa, bar for pressure; L, mL for volume; K and °C for temperature. Shows step-by-step working.
- [Interactive Periodic Table](https://toolcroft.com/periodic-table/): Browse all 118 elements with atomic number, symbol, mass, category, period, and group. Search by name, symbol, or number.
- [Kinetic Energy Calculator - KE = 1/2mv^2 & PE = mgh](https://toolcroft.com/kinetic-energy-calculator/): Calculate kinetic energy (KE = 1/2mv^2) and gravitational potential energy (PE = mgh). Solve for any of mass, velocity, or height.
- [LED Series Resistor Calculator - Ohm Value & Power](https://toolcroft.com/led-resistor-calculator/): Calculate the correct series resistor for your LED circuit. Enter supply voltage, forward voltage, and forward current; get resistance in ohms and nearest E12 value.
- [Lens Calculator - Thin Lens Equation 1/f = 1/do + 1/di](https://toolcroft.com/lens-calculator/): Solve the thin lens equation for focal length, object distance, or image distance. Computes magnification and tells you whether the image is real or virtual, upright or inverted.
- [Logic Gate Simulator](https://toolcroft.com/logic-gate-simulator/): Simulate AND, OR, NOT, NAND, NOR, XOR, XNOR, and BUFFER logic gates interactively.
- [Molar Mass Calculator - Molecular Weight from Formula](https://toolcroft.com/molar-mass-calculator/): Enter a chemical formula (e.g. H₂O, NaCl, C₆H₁₂O₆) and instantly calculate molar mass with a per-element breakdown. Supports parentheses and nested groups.
- [Molarity Calculator - Solution Concentration & Dilution](https://toolcroft.com/molarity-calculator/): Calculate solution molarity (moles per liter), dilute solutions using C₁V₁=C₂V₂, and convert between grams, moles, and liters. All offline.
- [NE555 Timer Calculator - Astable & Monostable Modes](https://toolcroft.com/ne555-calculator/): Calculate NE555 timer frequency, period, duty cycle, and pulse width for both astable (oscillator) and monostable (one-shot) configurations. Enter R1, R2, and capacitor values.
- [Op-Amp Calculator - Inverting, Non-Inverting & Difference Gain](https://toolcroft.com/op-amp-calculator/): Calculate op-amp gain for inverting, non-inverting, and difference amplifier configurations. Enter Rf and Rin to get the gain, or supply input voltage to compute the output.
- [Pendulum Calculator - Period, Frequency & Length](https://toolcroft.com/pendulum-calculator/): Calculate the period (T = 2pisqrt(L/g)), frequency, and length of a simple pendulum. Enter any two values to solve for the third. Supports custom gravitational acceleration.
- [pH Calculator - Acidity, [H], and pOH Converter](https://toolcroft.com/ph-calculator/): Convert between pH, hydrogen ion concentration [H], and pOH. Determine whether a solution is acidic, neutral, or basic.
- [Physics Constants Reference](https://toolcroft.com/physics-constants/): Look up 20+ fundamental physics constants including speed of light, Planck constant, gravitational constant, and more.
- [Pool Volume & Chlorine Calculator](https://toolcroft.com/pool-volume-calculator/): Estimate rectangular, oval, round, or kidney pool volume in gallons or litres, with variable-depth averaging, filter flow targets, and a rough initial shock amount.
- [Projectile Motion Calculator - Range, Height & Time](https://toolcroft.com/projectile-motion-calculator/): Calculate projectile range, maximum height, time of flight, and velocity components from initial speed and launch angle. Supports m/s and ft/s.
- [Reynolds Number Calculator - Laminar vs Turbulent Flow](https://toolcroft.com/reynolds-number-calculator/): Calculate the Reynolds number (Re = vL/) for any fluid and pipe geometry. Instantly determine whether flow is laminar, transitional, or turbulent.
- [Snell's Law Calculator - Refraction Angle & Total Internal Reflection](https://toolcroft.com/snells-law-calculator/): Solve Snell's Law nsin(theta) = nsin(theta) for the refracted angle or refractive index. Automatically detects total internal reflection and shows the critical angle.
- [Specific Heat Calculator - Q = mcT Solver](https://toolcroft.com/specific-heat-calculator/): Solve the specific heat equation Q = m x c x T for any of the four variables: heat energy (Q), mass (m), specific heat capacity (c), or temperature change (T). Includes a table of common materials.
- [Voltage Divider Calculator - R1, R2, V_out Solver](https://toolcroft.com/voltage-divider-calculator/): Solve the voltage divider formula V_out = V_in × R2/(R1+R2) for any unknown. Shows current draw and supports standard E12/E24 resistor series lookup.
- [Wavelength ↔ Frequency Calculator - EM & Sound Waves](https://toolcroft.com/wavelength-frequency-calculator/): Convert between wavelength and frequency for light, radio waves, and sound. Uses c=λf for EM waves and v=λf for sound with a customizable wave speed.
- [Wire Gauge (AWG) Calculator - Diameter, Ampacity & Resistance](https://toolcroft.com/wire-gauge-calculator/): Look up AWG wire gauge properties: diameter (mm/in), cross-section area, resistance per 100 ft/m, and maximum current capacity for chassis and in-wall wiring.

## Fun & Games
### Games & Puzzles
- [2048 Game](https://toolcroft.com/2048-game/): Slide numbered tiles on a 4×4 grid to combine them and reach the 2048 tile in this addictive puzzle game.
- [Aim Trainer - Click Accuracy & Speed Test](https://toolcroft.com/aim-trainer/): Improve your mouse accuracy and click speed. Targets appear at random positions - click them as fast as possible. Track your accuracy and average reaction time.
- [Blind Spot Test - Find Your Visual Blind Spot Online](https://toolcroft.com/blind-spot-test/): Find your eye's natural blind spot (optic disc) using a monocular fixation test. Cover one eye, fixate on the cross, and discover where the dot vanishes from your field of view.
- [Block Stacker - Free Online Tetris-Style Game](https://toolcroft.com/block-stacker/): Stack falling tetrominoes to clear lines in this Tetris-style puzzle game.
- [Brick Breaker - Free Online Breakout Game](https://toolcroft.com/brick-breaker/): Break all the bricks with a bouncing ball and paddle.
- [Checkers Game - Play Draughts Online Free](https://toolcroft.com/checkers-game/): Play checkers (draughts) against an AI opponent in your browser.
- [Chess Game - Play Chess Online Free](https://toolcroft.com/chess-game/): Play chess against a simple AI opponent in your browser.
- [Connect Four](https://toolcroft.com/connect-four/): Drop colored discs to connect four in a row - horizontally, vertically, or diagonally. Play vs AI or a friend.
- [Crossword Pattern Solver - Fill in the Blanks](https://toolcroft.com/crossword-solver/): Enter a crossword pattern with known letters and question marks for blanks (e.g. "C?T"). Find all matching words from the built-in dictionary.
- [Cryptogram Puzzle Generator](https://toolcroft.com/cryptogram-generator/): Generate substitution cipher cryptogram puzzles from quotes or your own text. Solve interactively in the browser.
- [D&D Dice & Initiative Roller - All RPG Dice](https://toolcroft.com/dnd-dice-roller/): Roll d4, d6, d8, d10, d12, d20, and d100 individually or in combinations. Track initiative order for up to 8 creatures. History log included.
- [Ear Training Game - Learn Musical Intervals](https://toolcroft.com/ear-training-game/): Train your musical ear by identifying intervals between two played notes.
- [Hangman Game](https://toolcroft.com/hangman/): Guess the hidden word letter by letter before the hangman is drawn. Multiple word categories available.
- [Lights Out - Classic Logic Puzzle Game](https://toolcroft.com/lights-out/): Toggle lights on a 5x5 grid to turn them all off. A classic logic puzzle.
- [Mad Libs Generator - Fill-in-the-Blank Story Builder](https://toolcroft.com/mad-libs-generator/): Choose a story template, fill in nouns, verbs, adjectives, and names, then reveal the hilarious result. Multiple story templates included.
- [Maze Generator](https://toolcroft.com/maze-generator/): Generate random mazes of any size using recursive backtracking and navigate through them with arrow keys or touch.
- [Memory Match Card Game](https://toolcroft.com/memory-match-game/): Classic concentration card-matching game. Flip cards to find matching pairs as fast as possible.
- [Mental Math Speed Quiz - Arithmetic Under Time Pressure](https://toolcroft.com/mental-math-quiz/): Sharpen your mental arithmetic with timed addition, subtraction, multiplication, and division questions. Choose difficulty and track your accuracy and speed.
- [Minesweeper](https://toolcroft.com/minesweeper/): Play the classic minesweeper game. Choose beginner, intermediate, or expert difficulty.
- [N-Back Working Memory Game - Dual N-Back Cognitive Trainer](https://toolcroft.com/n-back-game/): Train your working memory with the dual n-back task. Monitor a sequence of positions and letters and respond when a stimulus matches one from n steps back.
- [Nonogram Puzzle - Free Picross Logic Game](https://toolcroft.com/nonogram-puzzle/): Solve nonogram (picross) puzzles by filling in cells using row and column clues.
- [Number Memory Game - Digit Span Working Memory Test](https://toolcroft.com/number-memory-game/): Test and train your digit span - the number of digits you can hold in working memory. Numbers are shown briefly; type them back as accurately as possible.
- [Online Chess Clock - Count-Down Timer for Two Players](https://toolcroft.com/chess-clock/): Browser chess clock with configurable time controls (Bullet, Blitz, Rapid, Classical, custom). Tap to switch sides. Includes increment support.
- [Pong Game - Free Online Classic Arcade Game](https://toolcroft.com/pong-game/): Classic two-player Pong - play against the AI in the original arcade game.
- [Reaction Time Test - Measure Your Reflexes Online](https://toolcroft.com/reaction-time-test/): Measure your reaction time with a 5-trial click test. Click as fast as possible when the screen turns green. See your average and percentile ranking.
- [Rubik's Cube Timer](https://toolcroft.com/cube-timer/): Speedcubing timer with scramble generator, inspection time, and averages of 5 and 12 (Ao5 / Ao12) in WCA style.
- [Scrabble & Words With Friends Score Calculator](https://toolcroft.com/scrabble-score-calculator/): Calculate word scores for Scrabble or Words With Friends including double/triple letter and word bonuses. Supports blank tiles.
- [Simon Says - Color Sequence Memory Game](https://toolcroft.com/simon-says/): Play the classic Simon Says color memory game in your browser. Watch the growing color sequence and repeat it back. How far can you go?
- [Sliding Puzzle (15-Puzzle)](https://toolcroft.com/sliding-puzzle/): Play the classic 15-tile sliding puzzle. Shuffle and solve it by sliding tiles into the empty space.
- [Snake Game - Free Classic Online Snake](https://toolcroft.com/snake-game/): Classic snake game - eat apples, grow longer, avoid walls and yourself.
- [Solitaire Game - Free Online Klondike Solitaire](https://toolcroft.com/solitaire-game/): Play classic Klondike Solitaire card game in your browser.
- [Stroop Effect Test - Cognitive Interference Experiment](https://toolcroft.com/stroop-test/): Experience the Stroop effect - identify the ink color of a color word as fast as possible. Measures cognitive interference when the word and color conflict.
- [Sudoku Generator & Solver](https://toolcroft.com/sudoku-generator/): Generate a new Sudoku puzzle at easy, medium, or hard difficulty, then solve it in your browser with full validation.
- [Sudoku Solver - Solve Puzzles and Check Uniqueness](https://toolcroft.com/sudoku-solver/): Solve a 9×9 sudoku puzzle online, check whether its solution is unique, and import or copy puzzle strings. All solving runs in your browser.
- [Tic-Tac-Toe](https://toolcroft.com/tic-tac-toe/): Play Tic-Tac-Toe against Easy, Medium, or Impossible AI, with clear blunder rates, or challenge a friend in two-player mode. Track wins, losses, and draws.
- [Whack-a-Mole - Free Online Reflex Game](https://toolcroft.com/whack-a-mole/): Click the moles as they pop up! A classic reflex-testing arcade game.
- [Word Ladder - Transform Words One Letter at a Time](https://toolcroft.com/word-ladder/): Transform one word into another by changing one letter at a time, with each step being a valid word.
- [Word Search Generator](https://toolcroft.com/word-search-generator/): Create printable word search puzzles with your own word list. Words can be placed in 8 directions.
- [Word Unscrambler - Find Words from Scrambled Letters](https://toolcroft.com/word-unscrambler/): Unscramble letters to find all valid English words. Filter by length. Useful for Scrabble, Wordle, and other word games.
- [Wordle Solver & Helper - Filter Possible Words](https://toolcroft.com/wordle-helper/): Enter your known letters, positions, and misses to filter the Wordle word list. Narrows thousands of 5-letter words to only valid candidates - no dictionary upload needed.
- [Yahtzee Score Card - Digital Scoresheet](https://toolcroft.com/yahtzee-score-card/): Digital Yahtzee score card for up to 4 players. Auto-calculates upper section bonus, Yahtzee bonuses, and final totals.

### Random Generators
- [Bingo Card Generator - Free Printable BINGO Cards Online](https://toolcroft.com/bingo-card-generator/): Generate random 5×5 BINGO cards instantly. Mark numbers as they are called, with automatic win detection for rows, columns, and diagonals.
- [Coin Flipper - Flip a Virtual Coin Online](https://toolcroft.com/coin-flipper/): Flip one coin or up to 10 at once. Tracks session stats (heads/tails %) and full history. Optional weighted coin for probability experiments. All randomness uses Web Crypto.
- [Decision Wheel & Random Picker - Spin to Decide](https://toolcroft.com/decision-wheel/): Enter your options and spin the wheel to get a random pick. Great for making decisions, choosing winners, or settling debates. Runs entirely in your browser.
- [Dice Roller - Roll Any Dice Online (D&D Notation)](https://toolcroft.com/dice-roller/): Roll d4, d6, d8, d10, d12, d20, d100 or any custom die. Full D&D dice notation: 4d6kh3, 2d20kl1, 3d8! and more. Per-die results, totals, history. All randomness via Web Crypto.
- [Lottery Number Picker - Powerball, Mega Millions & More](https://toolcroft.com/lottery-numbers/): Generate random lottery numbers for Powerball, Mega Millions, EuroMillions, or a custom game. All picks use your browser's crypto API.
- [Magic 8-Ball - Ask the Online Magic 8 Ball](https://toolcroft.com/magic-8-ball/): Ask the classic Magic 8-Ball any yes/no question and receive one of 20 authentic responses. All decisions are final.
- [Mock Data / Fake Data Generator](https://toolcroft.com/mock-data-generator/): Generate realistic fake data instantly: names, emails, phones, addresses, UUIDs, and more. Export as JSON, CSV, or SQL INSERT statements. 100% client-side, no data sent anywhere.
- [Random Color Generator - HEX, RGB & HSL Colors Online](https://toolcroft.com/random-color-generator/): Generate random colors instantly in HEX, RGB, and HSL formats. Create single colors or full palettes of up to 20 colors with one click.
- [Random Name Picker - Pick Winners & Raffle Names Online](https://toolcroft.com/name-picker/): Pick one or more random names from a list. Supports raffle mode (remove after pick), unique picks, or draws with replacement. Runs entirely in your browser.
- [Random Number Generator](https://toolcroft.com/random-number-generator/): Generate random integers or decimals within any range. Set count up to 10,000, allow or exclude duplicates, and sort the output. All randomness uses the Web Crypto API.
- [Random Quote Generator - Inspiring & Famous Quotes Online](https://toolcroft.com/random-quote-generator/): Get a random inspirational, philosophical, or funny quote with one click. Filter by category and copy quotes to share anywhere.
- [Random Team Generator - Split a List Into Teams Instantly](https://toolcroft.com/team-generator/): Split a list into random teams by team count or maximum size. Uses an unbiased Web Crypto shuffle; all processing happens in your browser.
- [Random Trivia Generator - Quiz Questions Online](https://toolcroft.com/random-trivia/): Test your knowledge with random trivia questions across Science, History, Geography, Pop Culture, Sports, and Nature. Track your score and challenge yourself.
- [Secret Santa Generator - Random Gift Assignment Picker](https://toolcroft.com/secret-santa-generator/): Generate fair Secret Santa gift assignments. Add participants, set exclusions, and reveal each assignment one at a time.
- [UUID / GUID Generator](https://toolcroft.com/uuid-generator/): Generate cryptographically random UUIDs: v4, v1, v7, or NIL. Format as standard, no hyphens, uppercase, braces, or URN. Copy one or all.