What MD5 still does well
MD5 was designed in 1991 as a cryptographic hash function. The decades since have proven it cryptographically broken: collisions can be produced cheaply, and it must never be used for password storage, digital signatures, or anything where an adversary might engineer a collision. The function does, however, remain in active use for non-adversarial integrity checking, checksums, deduplication, and compatibility with older systems.
This generator computes the MD5 of any text in your browser using a pure JavaScript implementation. Nothing is uploaded — the entire computation happens locally.
Safe and unsafe uses
- Safe: file integrity checks where there is no adversary (verifying a download against a published MD5).
- Safe: cache keys, deduplication, content-addressable storage.
- Safe: compatibility with legacy systems that still require an MD5 column.
- Unsafe: password hashing — use bcrypt, scrypt, Argon2, or PBKDF2 with a per-user salt.
- Unsafe: digital signatures or any context where collision resistance matters.
Output format
The result is a 32-character hexadecimal string representing 128 bits of digest. Switch the casing between lowercase and uppercase to match the format expected by the system you are integrating with. Both produce identical bytes when decoded.