SHA-1 Hash Generator & Verifier
Generate SHA-1 hashes from text input and verify text against existing SHA-1 hashes. SHA-1 produces a 160-bit hash value but is deprecated due to security vulnerabilities - use SHA-256 or SHA-3 for new applications.
⚠️ Security Warning
- • SHA-1 is deprecated: No longer considered secure for cryptographic purposes
- • Vulnerable to collision attacks: Google demonstrated practical attacks in 2017
- • Not suitable for passwords: Use bcrypt, scrypt, or Argon2 instead
- • Legacy support only: Still used in some older systems and Git
- • Better alternatives: Use SHA-256, SHA-3, or other secure hash functions
About SHA-1
- • Algorithm: Secure Hash Algorithm 1, produces 160-bit hash value
- • Output format: 40 hexadecimal characters (e.g., aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d)
- • Deterministic: Same input always produces the same hash
- • Historical use: Widely used before cryptographic weaknesses were discovered
- • Git usage: Still used in Git for object identification (being phased out)
- • Performance: Faster than SHA-256 but much less secure
- • This tool uses a pure JavaScript implementation compatible with standard SHA-1
Recommended Alternatives
For general hashing: SHA-256, SHA-3, BLAKE2
For password hashing: Argon2, bcrypt, scrypt
For file integrity: SHA-256, SHA-512
For digital signatures: SHA-256 with RSA/ECDSA
Share This Tool
Found this tool helpful? Share it with others who might benefit from it!
💡 Help others discover useful tools! Sharing helps us keep these tools free and accessible to everyone.