File Hash Calculator

Drag a file onto the drop zone (or click Browse) to instantly compute its cryptographic hash. The tool runs entirely in your browser. Your file is never uploaded to a server.

Hash algorithm comparison

Algorithm	Output size	Speed	Security status	Common uses
MD5	128-bit (32 hex)	Very fast	❌ Broken - do not use for security	Non-security checksums, legacy systems
SHA-1	160-bit (40 hex)	Fast	❌ Deprecated - collision attacks known	Git commit IDs, legacy TLS
SHA-256	256-bit (64 hex)	Moderate	✅ Secure	File integrity, TLS, code signing
SHA-512	512-bit (128 hex)	Moderate	✅ Secure	High-security hashing, password systems
BLAKE2	Variable (up to 512-bit)	Very fast	✅ Secure	General-purpose hashing, faster than SHA-2

Use cases

Download verification: compare the hash of a downloaded file against the checksum published by the software vendor to confirm the file arrived intact and unmodified.
File tampering detection: store hashes of critical configuration files; re-check hashes periodically to detect unauthorized changes.
Deduplication: identify identical files across a large storage system - matching hashes (almost certainly) means identical content.
Digital signatures: hash functions are the foundation of digital signature schemes - you sign the hash, not the full document.

File integrity verification workflow

Download the file and the vendor-published checksum file (usually a .sha256 or .md5 file).
Open this tool, select the matching algorithm, and drag in your downloaded file.
Copy the computed hash and compare it against the value in the checksum file.
A perfect match confirms the file is genuine. Any difference - even one character - means the file is corrupted or tampered with.

Privacy

All hashing is performed locally using the browser's built-in Web Crypto API. No file data is ever sent to a server.