Online SHA1 Hash Generator
SHA-1 (Secure Hash Algorithm 1) produces a 160-bit (20-byte) hash value, rendered as a 40-character hexadecimal number.
Security Note: SHA-1 is considered cryptographically weak and should not be used for security-sensitive applications. Consider using SHA-256 or SHA-512 instead.
What is SHA-1?
SHA-1 was designed by the NSA and published in 1995. It produces a 160-bit hash value from input data of any size.
SHA-1 Characteristics
- Output Size: 160 bits (20 bytes, 40 hex characters)
- Block Size: 512 bits
- Rounds: 80
Legacy Use Cases
- Git version control (commit identifiers)
- Legacy certificate verification
- Non-security checksums