Developer Tools
UUID Generator — Free v4 UUIDs, No Server Required
Generate cryptographically secure v4 UUIDs using your browser's built-in CSPRNG (crypto.randomUUID). No server, no tracking — UUIDs are generated and stay entirely local. Copy any UUID in one click.
Frequently Asked Questions
- Are these UUIDs cryptographically secure?
- Yes. This tool uses crypto.randomUUID() which uses the browser's cryptographically secure random number generator (CSPRNG).
- Are UUIDs guaranteed to be unique?
- With 2^122 possible values, the probability of a collision is negligible — you are more likely to win the lottery many times in a row.
- What is a UUID used for?
- Unique identifiers for database records, session tokens, file names, and distributed system coordination.
- Is my data sent anywhere?
- No. UUIDs are generated locally in your browser.