SHA-256 Hash Generator & Verifier
Generate SHA-256 hashes from text input and verify text against existing SHA-256 hashes. SHA-256 is a secure cryptographic hash function producing 256-bit values, widely used in blockchain, digital signatures, and file integrity verification.
✅ Secure & Recommended
- • Cryptographically secure: SHA-256 is widely trusted and secure
- • Industry standard: Used in Bitcoin, TLS/SSL, and many security protocols
- • No known vulnerabilities: Resistant to collision and preimage attacks
- • Perfect for: File integrity, digital signatures, blockchain, certificates
- • Government approved: NIST and FIPS approved cryptographic standard
About SHA-256
- • Algorithm: Secure Hash Algorithm 256-bit, part of SHA-2 family
- • Output format: 64 hexadecimal characters (256 bits)
- • Deterministic: Same input always produces the same hash
- • One-way function: Computationally infeasible to reverse
- • Avalanche effect: Small input changes cause dramatic output changes
- • Block size: Processes data in 512-bit blocks
- • Performance: Slower than SHA-1 but much more secure
- • This tool uses a pure JavaScript implementation compatible with standard SHA-256
Common Use Cases
File Integrity Verification: Verify downloads and file corruption detection
Digital Signatures: Used with RSA/ECDSA for document signing
Blockchain & Cryptocurrency: Bitcoin mining and transaction verification
Password Storage: As part of secure password hashing (with salt and stretching)
Certificate Validation: SSL/TLS certificate fingerprints
API Authentication: Creating secure API tokens and signatures
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