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UUID Generator

Generate random version-4 UUIDs (universally unique identifiers), one at a time or in bulk.

About UUID v4

A UUID (universally unique identifier) is a 128-bit value used to identify records, sessions, or objects without a central authority handing out IDs. Version 4 UUIDs are generated from random bits — the chance of two colliding is astronomically small, which is why they're widely used as database primary keys and API request IDs.

How random are these?
This tool uses your browser's built-in cryptographically secure random number generator (the same one used for security-sensitive operations), not a simple pseudo-random function.
Are these stored anywhere?
No — each UUID is generated locally in your browser and never sent anywhere.

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