UUID Generator

Generate cryptographically random UUID v4 identifiers. Uses crypto.randomUUID().

Output

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is practically guaranteed to be unique across all systems. Version 4 UUIDs are randomly generated, with a theoretical collision probability so low it's considered impossible in practice.

Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where 4 indicates version 4 and y is one of 8, 9, a, b. Common uses: database primary keys, API request IDs, session tokens, distributed system identifiers.