UUID / GUID Generator

What is a UUID?

A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit identifier designed to be unique across systems without needing a central authority to assign it. It's typically shown as 32 hex digits split into five groups, like 550e8400-e29b-41d4-a716-446655440000.

This tool generates version 4 UUIDs, which are based on random numbers, using your browser's cryptographically secure random generator.

Common uses

UUIDs are widely used as database primary keys, API request identifiers, session tokens, and unique file or object names — anywhere you need an identifier that's extremely unlikely to collide with another one, even across different systems generating IDs independently.