UUID Generator

Generate random UUID v4 identifiers online for free — single or bulk, uppercase and no-hyphen options. Cryptographically secure, entirely in your browser.

100% private — runs entirely in your browser. Your files never leave your device.

How many

Uppercase No hyphens

UUID v4

Generates version-4 (random) UUIDs using your browser’s secure random generator — universally unique and never sent anywhere. Great for database keys, test data and correlation IDs.

How to use the UUID Generator

Set how many UUIDs you need.
Toggle uppercase or no-hyphens if you want.
Click Generate.
Copy them all.

What you can use it for

Create unique IDs for database rows
Generate correlation and request IDs
Produce test data in bulk
Get RFC-4122 v4 UUIDs instantly

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Frequently asked questions

What UUID version is this?

Version 4 (random), generated with your browser's secure random generator.

Can I generate many at once?

Yes — set the count (up to 500) and copy them all at once.

What are UUIDs used for?

Unique identifiers for database rows, API requests, test data and correlation IDs — unique without a central authority.

Is anything uploaded?

No — UUIDs are generated locally in your browser.