SHA1 Hash Generator

Generate SHA1 hashes for data integrity and verification

Text Input

Enter text to hash:

SHA1 Hash

Generated SHA1 hash:

Uppercase:

Lowercase:

About SHA1 Hashing

SHA1 (Secure Hash Algorithm 1) is a cryptographic hash function that produces a 160-bit (40-character hexadecimal) hash value. It's more secure than MD5 but less secure than SHA-256.

Common Uses:

Version control: Git uses SHA1 for commit identification
File integrity: Verify file downloads and transfers
Digital signatures: Part of older signature schemes
Checksums: Detect data corruption
Legacy systems: Supporting older applications

Characteristics:

Fixed length: Always produces 40-character hexadecimal output
Deterministic: Same input always produces same hash
One-way: Cannot be reversed to get original data
Avalanche effect: Small input changes cause large output changes

Security Note: SHA1 is deprecated for cryptographic use due to collision vulnerabilities. Use SHA-256 or SHA-3 for security-critical applications.