UUID 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.

You can generate up to 100 at a time. If you need more, just click Regenerate again.