Need a unique identifier for a database record, test fixture, or file name? This tool generates random, standards-compliant UUID v4 values one at a time or in bulk, using your browser's cryptographically secure random number generator.
How to use the uuid generator tool
- 1
Set the quantity
Choose how many UUIDs you need — one or up to a hundred at once.
- 2
Generate
Click Generate to create a fresh batch of random UUID v4 values.
- 3
Copy them
Copy an individual UUID or all of them at once.
Common use cases
Create test data
Generate unique IDs for seeding a test database or mock API responses.
Name a resource uniquely
Get a globally unique identifier for a file, session, or database record.
Generate bulk IDs
Produce a batch of UUIDs at once for a script or import file.
Frequently asked questions
A 128-bit identifier that's randomly generated (version 4), formatted as 32 hex digits in the standard 8-4-4-4-12 pattern. The chance of two matching by accident is astronomically small.