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Hash Algorithm Identifier

Identify possible hash algorithms from a pasted value. Check length, character set, common digest shapes, password-hash prefixes, token-like values, and ambiguity warnings locally in your browser.

Paste one hash or multiple hashes on separate lines. This tool identifies possible formats; it cannot prove the exact algorithm when formats overlap.

Options

Hash identification is based on format, length, prefix, and character set. Different algorithms can share the same visible shape.

Output

Hash identification output will appear here.
Hash identification happens directly in your browser. Your pasted values are not uploaded to a server.

Identifying Possible Hash Algorithms

Hash strings often appear in logs, database dumps, API responses, password migration work, security reports, and old application code. The visible shape of a hash can suggest likely algorithms, but it usually cannot prove the exact algorithm by itself.

This Hash Algorithm Identifier checks length, character set, common prefixes, and known formats to suggest possible hash types such as MD5, SHA-1, SHA-256, SHA-512, bcrypt, Argon2, scrypt, PBKDF2-style strings, Base64-like values, and UUID-like identifiers.

Checking a Hash Type

  1. Paste one hash or multiple hashes on separate lines.
  2. Choose single or multi-line input mode.
  3. Turn low-confidence matches on or off.
  4. Run the identifier and review possible algorithms.
  5. Use the result as a clue, not as final proof.

Common Hash Identifier Use Cases

  • Recognizing whether a value looks like MD5, SHA-1, or SHA-256.
  • Checking if a stored password hash looks like bcrypt or Argon2.
  • Reviewing old application hashes during migration work.
  • Separating random tokens, UUIDs, and hash-like values.
  • Finding weak legacy hash formats in exported data.
  • Documenting possible algorithms during security cleanup.

Example Hash Shapes

MD5:    5d41402abc4b2a76b9719d911017c592
SHA-1:  2aae6c35c94fcfb415dbe95f408b9ce91ee846ed
SHA256: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447
bcrypt: $2y$10$...

Hash Identification Has Limits

Many algorithms produce outputs with the same length and character set. For example, a 32-character hex string may be MD5, NTLM, or something else entirely. Without metadata, configuration, or a known input, the exact algorithm may remain uncertain.

Use this tool to narrow down possibilities. For security decisions, confirm the algorithm from the source system, code, database schema, or hashing configuration.

Frequently Asked Questions

Can this prove the exact hash algorithm?

No. It identifies likely algorithms based on format. Some hash algorithms share the same visible shape.

Why can MD5 and NTLM look similar?

Both are commonly represented as 32 hexadecimal characters, so a value can match both shapes.

Can this identify bcrypt and Argon2?

Yes. bcrypt and Argon2 have recognizable formatted prefixes and parameter sections.

Does this crack or reverse hashes?

No. This tool only identifies possible hash formats. It does not crack, reverse, or look up hashes.

Are my hash values uploaded anywhere?

No. Identification happens directly in your browser.