Free UUID Generator

Generate random UUIDs (v4) instantly. Everything runs in your browser.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that’s practically guaranteed to be unique. The v4 format uses random numbers:

550e8400-e29b-41d4-a716-446655440000

Common Use Cases

• Database primary keys (instead of auto-increment IDs)
• API request tracking and correlation IDs
• Session tokens and temporary identifiers
• File naming to avoid collisions
• Distributed systems where you can’t coordinate ID generation