Hash Identifier

When you encounter a hash string in logs, configs, or databases, knowing the algorithm helps you verify it, crack it (for authorized testing), or integrate with the right library. Different systems use different hashes — MD5 for checksums, SHA-256 for TLS, bcrypt for passwords.

MD5 and SHA-1 produce hex strings (0-9, a-f). MD5 is 32 chars; SHA-1 is 40; SHA-256 is 64; SHA-512 is 128. bcrypt and Argon2 use a special format with $ delimiters. NTLM hashes look like MD5 (32 hex). CRC32 is 8 hex chars.

Identification is heuristic. Two algorithms can produce the same-length hex output. Truncated or modified hashes may not match. For critical use, verify with the system that produced the hash or try common algorithms and compare outputs.