UUID Generator
Generate random version 4 UUIDs in bulk with your browser's cryptographic randomness. Copy one or all. Free, instant, private.
Runs 100% on your device - nothing you enter or upload leaves your browser.
How to use the UUID generator
Pick how many you need, press Generate, then copy individual IDs or the whole batch.
Common uses
- Primary keys in databases and test fixtures.
- Idempotency keys for API requests.
- Unique names for files, sessions and devices.
Frequently asked questions
What is a UUID?
A universally unique identifier - 32 hexadecimal digits in the pattern 8-4-4-4-12, like 3f6b2a90-1c4d-4e5f-9a8b-0c1d2e3f4a5b. Version 4 UUIDs are random.
Are these safe to use as IDs in my app?
Yes for most purposes. They are generated with crypto.getRandomValues (or crypto.randomUUID where available), the same randomness browsers use for security. The chance of a collision is effectively zero until you generate billions.
Are the UUIDs stored or sent anywhere?
No. They are created on your device and never transmitted.
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