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Hash Identifier

Paste a hash and see which algorithms could have produced it, based on length, alphabet and prefix.

Identify a hash

Best guess: —
Length: —
Character set: —
Identification is a heuristic based on length, alphabet and known prefixes; it cannot prove which algorithm produced a value.

How to use the Hash Identifier

  1. Paste the hash you want to identify into the box.
  2. Read the best guess, the length and the character set.
  3. Check the candidate list for other algorithms of the same size.

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Frequently Asked Questions

Common questions about the free online hash identifier.

It looks at the length and character set of the value and checks the known prefixes used by password hash formats such as bcrypt, Argon2 and crypt.
No. Many algorithms produce values of the same size, so the tool lists every plausible candidate and flags the most likely one first.
Because a 32 character hexadecimal value is most often an MD5 digest. MD4 and NTLM produce the same shape and are listed as alternatives.
It starts with a dollar sign followed by 2a, 2b or 2y, then a cost, and it is 60 characters long, for example the modular crypt format.
It marks a modular crypt format string, which stores the algorithm, its parameters and the salt together with the digest.
No. Hashes are one way functions. Identification only narrows down the algorithm, and recovery needs guessing or a precomputed table.
Yes for the analysis itself since everything runs in your browser, but treat password hashes as secrets and never publish them.
Yes. It is completely free, works offline once loaded, and needs no account and no installation.

Last updated: October 10, 2026