Password Hash Identifier

The Password Hash Identifier inspects a hash and suggests the likely algorithm — bcrypt, MD5, the SHA family, Argon2, and others — with a confidence level for each guess. It is for developers and analysts working out what produced an unfamiliar hash.

Identifying a hash by eye takes experience. Analysing its length and format locally narrows the candidates instantly, with the hash never uploaded.

1. Paste the hash you want to identify.
2. The tool examines its length, characters, and any prefix.
3. Review the ranked list of likely algorithms with confidence levels.
4. Use the most probable match to guide your next step.

• Algorithm guesses for common hash types
• Confidence level per candidate
• Recognises distinctive prefixes and formats
• Processed locally — Password Hash Identifier

• Working out which algorithm produced a stored hash
• Identifying a hash format during a security review
• Confirming whether a value is bcrypt or a fast hash
• Teaching how hash formats differ

• Use the prefix as your strongest clue; bcrypt and Argon2 announce themselves clearly.
• Remember length alone is ambiguous, since different algorithms can share it.
• Identification is a starting point, not proof, and never implies the hash can be reversed.

• Treating a guess as certain; several algorithms share the same length, so confidence is not proof.
• Assuming a hash is reversible once identified — identification does not mean it can be decrypted.
• Ignoring a recognisable prefix, which is often the strongest clue to the algorithm.