SHA1 Hash
Generate 160-bit SHA1 hash from text
About SHA1 Hash
SHA-1 (Secure Hash Algorithm 1) produces a 160-bit (40 hexadecimal characters) hash value. While more secure than MD5, SHA-1 is also deprecated for cryptographic use due to collision vulnerabilities.
Output length: 40 characters (160 bits)
Use cases: Git commits, legacy systems, non-cryptographic checksums
Security note: Deprecated for cryptographic use, but still common in version control
Hash Properties
Deterministic: Same input always produces same output
Fixed Length: Output size is always constant
One-way: Cannot reverse hash to get original input
Avalanche Effect: Small input change = big hash change
Fast Computation: Quick to calculate
Collision Resistant: Hard to find two inputs with same hash
Security Notice
- • Hashes are not encryption - they cannot be reversed
- • For password storage, use proper password hashing functions (bcrypt, scrypt, Argon2)
- • Always use salt when hashing passwords or sensitive data
- • MD5 and SHA-1 are not recommended for security-critical applications
- • All processing is done locally - no data is sent to our servers