UUID Generator
Generate cryptographically secure UUID v4 identifiers locally.
UUID v4 generated locally using the Web Crypto API. Nothing is sent anywhere.
What does the UUID generator do?
It generates random UUIDs (Universally Unique Identifiers) version 4 using the Web Crypto API. You can generate up to 20 at once.
How to use it
Set the count with the slider and click Generate UUIDs. Each UUID is a 36-character string in the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. Copy individual UUIDs or all of them at once.
Example
A generated UUID looks like: 550e8400-e29b-41d4-a716-446655440000. The '4' in the third group identifies it as version 4.
Privacy
UUIDs are generated locally using crypto.getRandomValues. Nothing is sent anywhere.
FAQ
What is a UUID used for?+
UUIDs are used as unique identifiers in databases, APIs, distributed systems, and anywhere you need a unique ID without a central authority.
Are UUID v4 collisions possible?+
Theoretically yes, but the probability is astronomically low — about 1 in 2^122. For practical purposes, UUID v4 collisions are not a concern.