UUID v4 Generator

No. Every UUID is generated on the spot using the browser's cryptographic random generator (crypto.randomUUID) and is never sent to or stored on a server.

A UUID v4 is a 128-bit identifier that's mostly randomly filled, making the chance of two different values colliding practically zero — which is why it's widely used as a database primary key or session ID.

Yes. Hyphens are just readability separators, so removing them doesn't change the underlying 32-character hex value. The standard notation, though, is the 8-4-4-4-12 hyphenated format.

Yes, they're effectively the same concept. GUID is Microsoft's name for the UUID standard, and the format and generation method are identical.

Yes — we also have a UUID v7 generator, where values sort in the order they were created. It's a better fit anywhere sorting and indexing matter, like a database primary key.

You can generate up to 1,000 at a time — plenty for bulk test data or seed data generation.

Yes. Press Enter to regenerate and Ctrl+C to copy all. If you're generating and copying repeatedly, you can do it all from the keyboard without reaching for the mouse.

No. Results are paginated 20 per page. Copy all (or press Ctrl+C) still copies every generated value at once, regardless of which page you're on.