Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text. All processing happens in your browser.
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Your text never leaves your browser. All hash calculations are performed locally using the Web Crypto API.
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What is a Hash?
A hash function takes an input and returns a fixed-size string of bytes. The output is unique to each unique input - even a tiny change in the input produces a completely different hash.
Hash Algorithm Comparison
MD5
128-bit hash. Fast but considered cryptographically broken. Use only for checksums.
SHA-1
160-bit hash. Deprecated for security. Still used in some legacy systems.
SHA-256
256-bit hash. Industry standard for security. Used in SSL, Bitcoin, and more.
SHA-512
512-bit hash. Highest security level. Better performance on 64-bit systems.
Common Use Cases
- Password storage (with proper salting)
- Data integrity verification
- Digital signatures and certificates
- File checksum verification
- Blockchain and cryptocurrency
Security Note
Hashes are one-way functions - you cannot reverse a hash to get the original input. However, MD5 and SHA-1 are vulnerable to collision attacks and should not be used for security-critical applications. Use SHA-256 or SHA-512 for modern security needs.