Hash Generator
Generate cryptographic hashes using various algorithms. Perfect for data integrity, passwords, and security applications.
About Hash Functions
Hash functions are mathematical algorithms that convert input data into fixed-size strings. They're essential for data integrity, password storage, and digital signatures.
Hash Algorithm Comparison
| Algorithm | Output Size | Security | Use Case |
|---|---|---|---|
| MD5 | 128-bit | ⚠️ Weak | Checksums only |
| SHA-1 | 160-bit | ⚠️ Deprecated | Legacy systems |
| SHA-256 | 256-bit | ✅ Strong | General purpose |
| SHA-512 | 512-bit | ✅ Very Strong | High security |
| SHA3-256 | 256-bit | ✅ Latest Standard | Modern applications |
Common Use Cases
- Password Storage: Hash passwords before storing in database
- Data Integrity: Verify files haven't been modified
- Digital Signatures: Create unique fingerprints for documents
- Blockchain: Proof of work and transaction verification
- Checksums: Verify download integrity
Security Notes
- MD5 and SHA-1 are cryptographically broken - avoid for security
- Use SHA-256 or higher for security-critical applications
- Add salt when hashing passwords
- Hash functions are one-way - cannot be reversed