About the Hash Identifier
Given an unknown hash, the first question is what made it. This tool inspects the format: prefixed formats like $2b$ (bcrypt), $argon2, $6$ (SHA-512 crypt) and $P$ (WordPress) are identified directly, and bare hex strings are matched by length to the algorithms that produce that many bits, so 32 hex characters suggests MD5, MD4 or NTLM, and 64 suggests SHA-256, SHA3-256 or BLAKE2s.
Length alone cannot always give a single answer, since several algorithms share an output size, so the tool lists the candidates. That is enough to know which generator to try in order to reproduce or verify the hash. It does not crack or reverse the hash; hashes are one-way by design.
To generate a candidate and compare, use the matching tool such as MD5 or SHA-256, or the All Hash Generator to see several at once.
How to use
- Paste the hash.
- Read the likely algorithm and its length.
- Reproduce it with the matching generator to confirm.
Common questions
- Can it tell me exactly which algorithm?
- For prefixed formats like bcrypt, yes. For bare hex, several algorithms share a length, so it lists the candidates.
- Can it crack or reverse the hash?
- No. Hashes are one-way. This tool identifies the format only.
- What does $2b$ mean?
- It is the bcrypt identifier. $argon2 is Argon2, $6$ is SHA-512 crypt, $P$ or $H$ is WordPress.