MD5 Hash Generator
MD5 produces a 128-bit (32 hex character) digest of any input, historically used for file checksums and cache keys. It is cryptographically broken — collisions are cheap to produce — so it must never be used for passwords or security-sensitive integrity checks. MD5 collisions, two different inputs producing the same hash, can now be constructed in seconds on ordinary hardware, which is why MD5 is still fine for a checksum that only needs to catch accidental corruption, but must never be trusted where someone might deliberately try to fake a match.
How it works
- Type or paste text.
- Read the MD5 digest, updated as you type.
- Copy the result with the Copy result button.
Formula RFC 1321 MD5: 512-bit block processing through 4 rounds of 16 steps each
Frequently asked questions
Is MD5 secure?
No. MD5 is cryptographically broken — collisions (two different inputs with the same hash) can be generated cheaply. Never use it for passwords, signatures, or security integrity checks.
What should I use MD5 for, then?
Non-adversarial checksums: detecting accidental file corruption, cache keys, deduplication — anywhere nobody is deliberately trying to fake a match.
Why isn’t this built into the browser like SHA-256?
The Web Crypto API deliberately excludes MD5 because of its known weaknesses; this tool implements the algorithm directly in JavaScript instead.
For passwords, what should I use instead?
A purpose-built password hash (bcrypt, scrypt, Argon2) on the server side — never a bare hash of any kind (MD5, SHA-1, or even SHA-256) for password storage.
Is my text uploaded anywhere?
No. Hashing runs entirely in your browser.