Hash Generator
Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) from text.
Enter text to generate cryptographic hash values using multiple algorithms simultaneously. Useful for password hashing, data integrity verification, and digital signatures.
All processing happens in your browser - your data is never sent to our servers.
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What is a Hash Function?
A cryptographic hash function takes an input (message) and produces a fixed-size string of bytes, typically displayed as a hexadecimal number. Key properties include:
- Deterministic: Same input always produces the same output
- One-way: Cannot reverse the hash to get the original input
- Collision-resistant: Extremely difficult to find two inputs with the same hash
- Avalanche effect: Small input changes cause dramatic hash changes
Hash Algorithm Comparison
| Algorithm | Output Size | Security | Use Case |
|---|---|---|---|
| MD5 | 128 bits (32 hex) | Weak | Checksums only (not security) |
| SHA-1 | 160 bits (40 hex) | Deprecated | Legacy systems only |
| SHA-256 | 256 bits (64 hex) | Strong | General security, Bitcoin |
| SHA-512 | 512 bits (128 hex) | Strong | High-security applications |
Common Use Cases
- Password storage (with salt)
- File integrity verification
- Digital signatures
- Data deduplication
- Blockchain and cryptocurrency
- Message authentication codes
- Version control (Git)
- Certificate generation
Security Notice
For password hashing, use purpose-built algorithms like bcrypt, scrypt, or Argon2 instead of raw SHA-256. These include built-in salting and are designed to be slow, making brute-force attacks impractical.
Related Tools
- Base64 Encoder Encode/decode Base64 strings
- JWT Decoder Decode JSON Web Tokens
- Password Generator Generate secure passwords
Example Hashes
MD5 of "hello":
5d41402abc4b2a76b9719d911017c592
SHA-256 of "hello":
2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824