Hash Identifier
Identify the algorithm behind a hash string. Detect MD5, SHA-1, SHA-256, bcrypt, Argon2, and more by format. Runs in your browser.
Length
Charset
Possible algorithms
Reference
How does the identifier work?
Hash algorithms produce fixed-length output. The tool inspects length (e.g. 32 hex chars = MD5, 64 hex = SHA-256) and format markers (e.g. $2b$ = bcrypt, $argon2id$ = Argon2). Multiple algorithms can produce the same length (MD5 and NTLM are both 32 hex chars), so the tool returns all candidates.
Common uses
- Forensics — identify unknown hashes from logs or dumps.
- CTFs — quickly classify a challenge hash.
- Migration — inspect legacy password column formats.
- Audit — confirm a hash matches the expected algorithm.
Privacy
All analysis runs 100% in your browser. No data is sent to any server.