Identify bcrypt hash
hash = $2b$12$LJ3m4ys3Gl4x7F9LQxYUXeJpC1aKbBx1Z5Y5Y5Y5Y5Y5Y5Y5Y5Y5
Result: Format: bcrypt, Algorithm: bcrypt (Blowfish), Cost: 12, Security: Strong (modern adaptive hash).
Password Hash Identifier
Paste a password hash to identify its format, algorithm, and parameters. Supports Argon2, bcrypt, scrypt, PBKDF2, SHA-crypt, and plain hex hashes. The tool shows the detected algorithm, parameters (cost, memory, iterations), and security assessment. Useful for understanding how passwords are stored in legacy systems.
Privacy: this tool processes all data entirely in your browser. Passwords and hashes are never sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Identify MD5 hash
hash = $1$salt$hash123
Result: Format: MD5-crypt, Algorithm: MD5, Security: Legacy - migrate to Argon2id or bcrypt.
Frequently asked questions
Why would I need to identify a hash format?
When migrating from a legacy system, you need to know how passwords are currently stored to plan the migration. Identifying the hash format tells you the algorithm, parameters, and security level.
Can this tool crack passwords?
No. This tool only identifies the hash format and parameters. It does not attempt to reverse or crack any hash. For password auditing, use dedicated tools like hashcat or John the Ripper with proper authorization.
What does "legacy" mean?
Legacy algorithms (MD5-crypt, DES-crypt, plain SHA hashes) are no longer recommended for password storage. They are too fast and lack modern security features like salting and adaptive cost. Migrate to Argon2id, bcrypt, or scrypt.
Is my hash sent anywhere?
No. Hash identification happens entirely in your browser. The hash is never transmitted to any server.
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