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Hash Identifier

Identify hash algorithms from hash strings. Detects MD5, SHA-1, SHA-256, SHA-384, SHA-512, bcrypt, Argon2, scrypt, PBKDF2, CRC-32, and more based on length, prefix patterns, and character set analysis. Shows confidence levels and hash metadata. Runs entirely in your browser — your data never leaves your machine.

hash identifier md5 sha bcrypt crypto security

Published May 29, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Paste a hash string and the tool analyzes its length, character set, and prefix patterns to identify the most likely hash algorithm. Results are ranked by confidence level (high, medium, low) to help you narrow down the exact algorithm.

Features

  • 25+ hash algorithms: MD5, MD4, NTLM, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3, BLAKE2b, CRC-16, CRC-32, Adler-32
  • Password hashes: bcrypt, scrypt, Argon2, PBKDF2, Unix crypt ($1$, $5$, $6$)
  • Base64 detection: identifies base64-encoded MD5, SHA-256, SHA-512
  • Confidence levels: high (strong match), medium (likely), low (possible)
  • Hash info panel: length, hex/base64 charset detection, prefix extraction
  • 5 examples: MD5, SHA-1, SHA-256, bcrypt, SHA-512
  • Private: runs entirely in the browser — no data transmitted

Use Cases

  • Identifying unknown hashes found in databases or log files
  • Determining which algorithm produced a hash for verification
  • Security auditing — checking which hash algorithms are in use
  • CTF challenges — quickly identifying hash types
  • Validating hash format before attempting to verify or crack