Hash Generator

Generate MD5, SHA-1, SHA-256 or SHA-512 of any text. Runs in your browser — nothing is uploaded. You can verify checksums and hashes instantly.

Select an algorithm to generate the hash.
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Hash Generator — MD5, SHA-1, SHA-256, SHA-512 Online

This free hash generator computes a cryptographic fingerprint of your text with MD5, SHA-1, SHA-256, or SHA-512 in a single click. It runs entirely in your browser using the Web Crypto API and a pure-JavaScript reference implementation, so your data is never sent to a server. Hashes are the backbone of integrity checks, password storage, and deduplication — generate one to verify a string, compare files, or check whether two inputs differ.

Which Hash Should I Use?

SHA-256 and SHA-512 are the modern, collision-resistant choices recommended for new work — from TLS certificates to secure password hashing (always with a salt). SHA-1 is still common for legacy checksums and Git object IDs, but it is no longer considered cryptographically secure. MD5 is fast and widely supported for checksums and deduplication, but it is broken for security purposes. For anything requiring strong security, prefer SHA-256 or SHA-512.

How to Verify a Checksum

Paste your text or file contents into the box, pick an algorithm, and copy the resulting hash. Compare it against the checksum published by the file's author — if they match, the data is intact and untampered. Because hashing is one-way, the same input always produces the same hash, which is exactly what makes checksum verification reliable.

Hash Generator FAQ

Is my text sent anywhere? No — hashing happens entirely in your browser. Do all algorithms work offline? Yes. Is SHA-256 better than MD5? For security, yes; SHA-256 resists the collisions that break MD5 and SHA-1. Can I hash a whole file? Paste its contents here, or use a dedicated file-hash tool for large binaries.