Online MD5 Generator
Compute the 128-bit MD5 digest of any text for checksums, cache keys, and Gravatar-style identifiers.
Generate MD5 hashes instantly in your browser. Free online MD5 generator with uppercase option — checksums for files, strings and passwords.
Calculator Inputs
About MD5 Hash
Compute the 128-bit MD5 digest of any text for checksums, cache keys, and Gravatar-style identifiers.
MD5 digests the input in 512-bit blocks through 64 rounds of nonlinear mixing, producing a fixed 32-character hex fingerprint. Identical inputs always give identical digests, and any one-bit change avalanches across the whole output.
MD5 is broken for security (collisions are practical) — never use it for passwords or signatures; prefer SHA-256 or bcrypt. For non-adversarial checksums and identifiers it remains fast and perfectly adequate. Everything runs locally in your browser.
Where it is used
Verifying file integrity against published hashes, keying caches and dedupe indexes, and Gravatar URL building.
How to use the MD5 Hash
- Text To Hash — enter the value (e.g. hello).
- Output Case — enter the value.
- Calculate — press the Calculate button to see the result instantly above.
Formula
RFC 1321: pad, 64 rounds of FF/GG/HH/II mixing, little-endian hex digest.
Examples
Example
Frequently Asked Questions
- Is MD5 secure for passwords?
- No. MD5 is fast by design, making brute force cheap, and collisions are practical. Use bcrypt, scrypt, or Argon2 for passwords.
- Why do empty and non-empty inputs differ so much?
- That is the avalanche effect: padding alone changes every block, so even similar inputs produce unrelated digests.
- Does it handle Unicode text?
- Yes. Input is UTF-8 encoded before hashing, so emoji and non-Latin scripts hash deterministically.