Hash Generator

1. Enter text — Type or paste any text into the input area.
2. Select algorithms — Check which hash algorithms you need: MD5, SHA-1, SHA-256, and/or SHA-512.
3. Generate — Click Generate Hashes or the results update automatically as you type.
4. Copy any hash — Click the Copy button next to any hash to copy it to your clipboard.

A hash generator computes a fixed-length "fingerprint" of any input text using a cryptographic hash function. Hash functions are one-way — you cannot reverse a hash back to the original input. Even a tiny change in the input produces a completely different hash (the avalanche effect).

This tool supports four widely-used hash algorithms: MD5 (128-bit), SHA-1 (160-bit), SHA-256 (256-bit), and SHA-512 (512-bit). SHA-256 and SHA-512 are part of the SHA-2 family and are considered cryptographically secure.

Each hash algorithm uses a different internal construction:

• MD5 — Uses a Merkle–Damgård construction with 64 rounds of compression. Fast but has known collision vulnerabilities. Not suitable for security-sensitive applications.
• SHA-1 — Similar structure to MD5 but with 80 rounds and a larger digest (160 bits). Deprecated for security use since 2017.
• SHA-256/512 — Use the SHA-2 construction with 64 (SHA-256) or 80 (SHA-512) rounds. Widely trusted for SSL/TLS, blockchain, and password hashing.

SHA hashes are computed using the browser's built-in crypto.subtle.digest() API. MD5 is implemented in JavaScript (since the Web Crypto API doesn't support it). All processing happens locally in your browser.

• File integrity verification — Compare the hash of a downloaded file against the publisher's published hash to ensure it hasn't been tampered with.
• Cache key generation — Hash API parameters to create a unique, deterministic cache key.
• Data deduplication — Use hashes as fingerprints to identify and remove duplicate records.
• Password verification — Hash passwords before storing them (though use a dedicated algorithm like bcrypt/argon2 for production).