Password & Security

Encrypt and decrypt text in your browser using AES-256-GCM and PBKDF2. Everything stays on your device.

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.

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.

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.

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.

Generate strong Diceware passphrases using the EFF wordlist and Web Crypto randomness. Memorable, high-entropy, and never transmitted anywhere.

Generate strong random passwords using the Web Crypto API.

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.

Encode or decode ROT13 online instantly. ROT13 is self-inverse: apply it twice to restore the original text. Useful for hiding spoilers, puzzle answers, and obfuscating text.

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.

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.