UUID Generator
Generate cryptographically random UUID v4 identifiers, one or a thousand at a time.
UUID Generator — This generator produces RFC 4122 version-4 UUIDs using your browser’s cryptographically secure random number generator (crypto.randomUUID). Each value is a 128-bit identifier with 122 random bits, so collisions are practically impossible at any realistic scale.
UUIDs are generated locally with your browser’s crypto API. Nothing is sent anywhere.
What is uuid generator?
This generator produces RFC 4122 version-4 UUIDs using your browser’s cryptographically secure random number generator (crypto.randomUUID). Each value is a 128-bit identifier with 122 random bits, so collisions are practically impossible at any realistic scale.
Generate a single ID or up to 1,000 at once for seeding databases, fixtures, and test data, and copy them all with one click.
How to use it
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Choose a count
Any number from 1 to 1,000.
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Set the format
Toggle uppercase letters or remove hyphens for compact IDs.
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Generate and copy
Press Generate for a fresh batch; Copy all puts every UUID on your clipboard.
Examples
Standard format
The canonical 8-4-4-4-12 hexadecimal layout.
Result: f47ac10b-58cc-4372-a567-0e02b2c3d479
Compact uppercase
No hyphens, uppercase — common in legacy systems.
Result: F47AC10B58CC4372A5670E02B2C3D479