Free Online MD5 Hash Generator

1. Type or paste text into the input box at the top of the page.
2. Read the MD5 digest in the output box as it updates after each keystroke.
3. Click Copy hash to send the 32-character hex string to your clipboard.
4. Click Clear to wipe the input and start a new hash.

MD5 (Message-Digest Algorithm 5) was designed by Ronald Rivest in 1991 and standardised in RFC 1321. It maps any input to a fixed 128-bit (32-character hex) digest. The same input always produces the same output, and small changes to the input cascade into completely different digests via the avalanche property.

Important caveat: MD5 is cryptographically broken for security use. Wang and Yu published practical collisions in 2004, and chosen-prefix collisions have been demonstrated in seconds on consumer hardware. Never use MD5 for digital signatures, TLS certificates, password storage or anything an adversary might attack. It remains useful for non-adversarial fingerprinting — cache keys, ETags, file-deduplication keys, idempotency tokens — where collisions don't matter.

This page runs MD5 entirely in your browser using a pure-JavaScript implementation, since the Web Crypto API intentionally omits MD5 to discourage its use. Your input never leaves the device. Do not paste production secrets into any hashing tool, including this one.