Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text — nothing is uploaded.
Generate cryptographic hashes online
Type or paste any text and get its hash instantly — no button press, no upload. All computation happens locally in your browser using the Web Cryptography API, so even sensitive strings never leave your machine. SHA-256 is the most widely used choice for integrity checks and checksums; SHA-512 provides a larger output for higher-collision resistance.
Hashes are one-way functions: the same input always produces the same output, but you cannot reverse a hash back to the original text. This makes them useful for verifying file integrity, storing passwords, and building digital signatures.
FAQ
Is my text sent to a server? No. The Web Crypto API runs entirely client-side; nothing leaves your browser.
Which algorithm should I choose? SHA-256 is the safest default for most uses. Avoid SHA-1 for security-sensitive work — it is considered cryptographically weak, though still useful for non-security checksums.