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
📊 Technical Specifications
- • 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
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About SHA-1 Hash Generator & Verifier
The SHA-1 Hash Generator & Verifier is a free online tool that creates SHA-1 hash values from text input and verifies text against existing SHA-1 hashes. SHA-1 (Secure Hash Algorithm 1) produces a 160-bit hash value, providing better collision resistance than MD5, though it's now deprecated for cryptographic security applications.
Why use a SHA-1 Hash Generator & Verifier?
This tool offers quick SHA-1 hash generation for legacy system compatibility and situations where SHA-1 hashes are still required. While SHA-1 is no longer recommended for new cryptographic applications due to known vulnerabilities, it remains useful for version control systems, checksums, and maintaining compatibility with older systems that rely on SHA-1 hashes.
Who is it for?
Ideal for developers working with legacy systems, Git version control, and applications that still require SHA-1 compatibility. Also valuable for system administrators managing older infrastructure, security researchers studying hash functions, and students learning about cryptographic hash evolution and vulnerabilities.
How to use the tool
- Input the text or data you want to hash into the provided text field
- Click the generate button to create the SHA-1 hash instantly
- Copy the resulting 40-character hexadecimal SHA-1 hash value
- For verification, enter both the original text and existing SHA-1 hash to check for matches
- Use the clear function to reset inputs and generate new hashes as needed
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