UUID Generator

Examples

Generate 1 UUID

f47ac10b-58cc-4372-a567-0e02b2c3d479

Generate 1 UUID (uppercase)

F47AC10B-58CC-4372-A567-0E02B2C3D479

Generate 5 UUIDs

a3bb189e-8bf9-4888-9912-ace4e6543002
9c5b94b1-35ad-49bb-b118-8e8fc24abf80
71f2e2c4-f5a0-4670-963e-75b154e9c8e1
d4f5a8c3-...

Frequently Asked Questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across space and time. Version 4 UUIDs are randomly generated and are the most commonly used type. They follow the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where x is a random hex digit and y is one of 8, 9, a, or b.

What is the difference between a UUID and a GUID?

UUID and GUID (Globally Unique Identifier) are essentially the same thing. UUID is the standard term used in most programming contexts, while GUID is the term commonly used in Microsoft technologies. Both refer to the same 128-bit identifier format.

Are the generated UUIDs truly unique?

Yes. Version 4 UUIDs are generated using a cryptographically secure random number generator (crypto.randomUUID). The probability of generating a duplicate is astronomically low — you would need to generate about 2.71 quintillion UUIDs to have a 50% chance of a single collision.

Is my data safe?

Yes. All UUID generation happens locally in your browser using the Web Crypto API. No data is sent to any server.

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