🆔 Free Tool
UUID Generator
Generate version 4 UUIDs instantly. Used in apps, databases, and APIs to create unique identifiers.
About UUIDs
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as 32 hexadecimal characters separated by hyphens. They're used in software development to uniquely identify records without needing a central registry.
What is a version 4 UUID?
Version 4 UUIDs are randomly generated. The chance of two version 4 UUIDs colliding is astronomically small — roughly 1 in 5.3 undecillion. This makes them ideal for database primary keys and distributed systems.
Are these UUIDs truly unique?
Yes for all practical purposes. They're generated using cryptographically secure random numbers in your browser. No two UUIDs generated here will ever be the same.