About this tool
A UUID (Universally Unique Identifier) is a 128-bit value used to identify records, sessions, or objects without a central coordinating authority. This tool generates version 4 (random) UUIDs using your browser's cryptographically secure random number generator.
How it works
- Set how many UUIDs you want (up to 100).
- Click Generate to create a new batch instantly using crypto.randomUUID().
- Copy an individual UUID or all of them at once.
Frequently asked questions
How unlikely is a UUID collision?
A v4 UUID has 122 random bits. You'd need to generate roughly a billion per second for about 85 years before a 50% chance of a single collision — collisions are not a practical concern.
Are these UUIDs generated on a server?
No — they're generated locally in your browser using the Web Crypto API, which is cryptographically secure.