UUID Generator
Generate random UUID v4 identifiers.
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About the UUID Generator
Generate random UUID v4 identifiers (also called GUIDs) free — one at a time or in bulk. Each 128-bit ID is produced with the cryptographically secure Web Crypto API, making collisions practically impossible and the values safe for production databases, API keys' identifiers, test fixtures, and distributed systems. Copy a single UUID or the whole batch in one click.
How to use the UUID Generator
- 01Choose how many UUIDs you need.
- 02Click Regenerate for a fresh batch.
- 03Copy them all with one click.
Frequently asked questions
What is a UUID v4?
A version-4 UUID is a 128-bit identifier generated from random data, with an extremely low chance of collision.
Are these safe for production?
Yes — they're generated with the cryptographically secure Web Crypto API.
Can two UUIDs ever collide?
Theoretically, but the odds are astronomically small — you'd need to generate billions per second for decades to expect one collision.