Hash Identifier

Guess the algorithm by shape

Paste a hash string. This tool ranks the likely algorithms by length and format: MD5, SHA-1, SHA-256, SHA-512, CRC32, bcrypt, argon2, NTLM, MySQL, and more. It reads the shape of the string, not its meaning, so results are candidates, not proof. Nothing leaves this page.

Hash

This is format-based heuristic identification, not verification. Different algorithms often produce the same length and character set (for example MD5, NTLM, and several others are all 32 hex characters), so many results are ambiguous by nature. The tool cannot confirm which algorithm actually produced a hash. Use the ranked list as a starting point.

Quick reference

Algorithm	Length	Format
CRC32	8	hex
MD5 / NTLM / MD4	32	hex
SHA-1	40	hex
SHA-224	56	hex
SHA-256	64	hex
SHA-384	96	hex
SHA-512	128	hex
bcrypt	60	$2a$ / $2b$ / $2y$ prefix
argon2	varies	$argon2i$ / $argon2d$ / $argon2id$ prefix
MySQL 4.1+	41	* then 40 hex
MySQL < 4.1	16	hex