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UUID Generator
Generate random UUIDs.
DeveloperAbout
Generates RFC 4122 version 4 UUIDs using your browser's built-in crypto.randomUUID().
Generate one UUID or a batch of up to 100 identifiers for development, testing, or sample data. Copy an individual value or the complete newline-separated list.
What you can do
- Generates standards-shaped random UUID v4 values.
- Creates batches of 1, 5, 10, 25, 50, or 100.
- Uses the browser crypto API and requires no server request.
Common uses
- Create database primary keys for test data.
- Prepare identifiers for fixtures or API examples.
- Generate placeholder IDs during prototyping.
Frequently asked questions
Are the UUIDs generated securely?
The tool uses crypto.randomUUID(), provided by the browser Web Crypto API, instead of Math.random().
Can a UUID still collide?
A theoretical collision is possible, but the random space of UUID v4 makes it extraordinarily unlikely for normal application use.