UUID Generator

How it works

We use the browser's crypto.randomUUID() API, which produces a version 4 UUID with 122 bits of cryptographic randomness — collision-safe for any practical purpose.

Frequently asked

Are these UUIDs unique?

Practically, yes. The probability of two UUID v4 values colliding is so low that you would have to generate billions per second for centuries to expect one collision.

Is this version 4 (random) UUID?

Yes — UUID v4. The first character of the third group is always "4" by spec.

Can I use these for security tokens?

They are cryptographically random, so technically yes. For high-security tokens, prefer crypto.getRandomValues with explicit length and use a longer encoding.