UUID Generator
Generate cryptographically random UUID v4 identifiers instantly. Generate up to 100 at once and copy them individually or all together. Uses your browser's secure random source.
How it works
UUIDs are generated with crypto.randomUUID(), which produces version 4 (random) UUIDs using a cryptographically secure random number generator — 122 bits of entropy per UUID, formatted as 8-4-4-4-12 hexadecimal groups.
Frequently asked questions
What is a UUID v4?
A 128-bit identifier where 122 bits are random. The format is xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx — the '4' marks the version.
Can two UUIDs collide?
Practically no. The probability of generating a duplicate random UUID is astronomically small — you'd need billions per second for decades to approach a 50% chance.