UUID Generator

UUID Generator

Generate random UUIDs (version 4) for your apps and databases.

How many:

About the UUID Generator

Our free UUID generator creates random version 4 UUIDs (universally unique identifiers) for apps, databases and APIs. Generate 1 to 100 at a time and copy them all with one click.

How to Use the UUID Generator

1. Set How many (1–100).
2. Click Generate — UUIDs appear instantly.
3. Click Copy All to copy the list.

What Is a UUID?

A UUID is a 128-bit identifier like 550e8400-e29b-41d4-a716-446655440000 — practically guaranteed unique without a central registry. Version 4 UUIDs are randomly generated, making them ideal for database primary keys, session tokens, file names and distributed systems where auto-increment IDs would collide.

Frequently Asked Questions

UUID v4 vs v1 — what is the difference?

v4 is fully random; v1 embeds a timestamp and MAC address. v4 is preferred for privacy and simplicity — this tool generates v4.

Can two UUIDs be identical?

Theoretically yes, practically never — with 2¹²² possible v4 values, collisions are astronomically unlikely.

Are generated UUIDs truly random?

They use your browser's Math.random-based generation, fine for IDs and non-security uses. For cryptographic tokens, use your platform's secure random API.