network requests sent: 0
UUID & Hash Generator
Generate random UUID v4 values, or hash any text with SHA-1/256/384/512, using your browser's built-in Web Crypto API. No library, no network call.
UUID v4
Hash generator
Batch mode
Generate multiple UUIDs
Hash multiple lines
A note on MD5
This tool deliberately does not offer MD5 or SHA-1 for anything security-sensitive — both are broken for collision resistance. SHA-1 is included here only because some legacy systems still expect it for non-security checksums. For anything protecting real data, use SHA-256 or better.