SHA-1 Hash Generator

Generate SHA-1 hashes from text. Create 160-bit SHA-1 checksums for data verification and integrity checks.

SHA-1 Hash Generator

Generate SHA-1 (Secure Hash Algorithm 1) hashes from any text input. SHA-1 produces a 160-bit hash value, typically represented as a 40-character hexadecimal number.

What is SHA-1?

SHA-1 is a cryptographic hash function designed by the NSA. It produces a 160-bit hash value and is more secure than MD5, though it has known vulnerabilities and is being phased out for security-critical applications.

SHA-1 Characteristics

  • Fixed Length - Always produces a 40-character hexadecimal output
  • Deterministic - Same input always produces the same hash
  • Fast - Quick to compute
  • Widely Used - Historically used in Git, TLS, and SSL

Use Cases

  • Git - Git uses SHA-1 for commit hashes
  • File Verification - Verify file integrity with SHA-1 checksums
  • Data Integrity - Detect data corruption or tampering
  • Legacy Systems - Work with systems that require SHA-1

Security Warning

Important: SHA-1 is deprecated for security-critical applications. Collision attacks have been demonstrated. For new applications, use SHA-256 or SHA-512 instead.

Example

Input: "hello world"

SHA-1 Hash: 2aae6c35c94fcfb415dbe95f408b9ce91ee846ed

All hashing is performed locally in your browser using the Web Crypto API.

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