MD5 Hash Generator
MD5 produces a 128-bit (32 hex character) digest from any input and is one of the most widely deployed hash functions in software. It is fast and convenient for non-security work such as cache keys, content fingerprinting, ETags, and verifying that a download arrived intact.
This generator runs entirely in your browser, so the text you hash never leaves your device. Type anything below and the 32-character MD5 digest updates the moment you stop typing — no upload, no sign-up, no rate limit.
| Property | Value |
|---|---|
Digest size | 128 bits (16 bytes) |
Hex length | 32 characters |
Block size | 512 bits |
Designed | 1991 (Ronald Rivest) |
Secure for passwords? | No — use bcrypt/Argon2 |
hello→5d41402abc4b2a76b9719d911017c592The MD5 of the lowercase word "hello" is a useful sanity check for any MD5 implementation.
Frequently asked questions
Is MD5 still safe to use?
MD5 is broken for security purposes — practical collision attacks exist, so it must never be used for passwords, digital signatures, or anything that resists tampering. It is still perfectly fine for non-adversarial uses like checksums, cache keys, and deduplication.
Why is an MD5 hash always 32 characters?
MD5 always outputs a 128-bit digest. Written in hexadecimal that is 32 characters (each hex digit encodes 4 bits), no matter whether you hash one byte or a gigabyte of text.
Can I get the original text back from an MD5 hash?
No. Hashing is one-way, so the input cannot be recovered from the digest. So-called MD5 decrypters are just lookup tables of previously seen values — they cannot reverse the function itself.
Does this MD5 tool send my text anywhere?
No. The hash is computed locally in your browser with JavaScript. Nothing you type is transmitted, logged, or stored on a server.