Hash Identifier

Identify which algorithm a hash was generated with.

Paste a hash to identify

What Is a Hash Identifier?

The Hash Identifier analyzes the length and format of a hexadecimal hash to suggest which algorithm likely produced it. Different hash functions produce characteristic digest lengths (for example, MD5 is 32 hex characters, SHA-1 is 40, and SHA-256 is 64), allowing quick identification of unknown hashes.

How to Use This Hash Identifier

1
Paste a HashEnter any hexadecimal hash into the input field.
2
Automatic AnalysisThe tool immediately lists the most likely algorithms based on digest length.
3
Review NotesRead the notes for important caveats about length-based identification.

Frequently Asked Questions

Length-based identification is a useful first guess but not definitive, because several algorithms share the same output length. For example, a 64-character hash could be SHA-256, SHA3-256, or BLAKE3.

No. Password hashes with salt (like bcrypt or scrypt) cannot be identified by length alone, and HMAC outputs look like their underlying hash length. Treat the results as educated guesses.

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