UUID Generator

How to use UUID Generator

Enter a quantity from 1 to 100. UUID v4 identifiers use cryptographically secure browser randomness for test data and development workflows.

Create identifiers for a small import batch

Enter a whole-number quantity from 1 to 100 and choose Generate. The result places one UUID on each line for copying into a fixture or import file. These are random version 4 UUIDs, generated by crypto.randomUUID in a secure browser context.

Recognize the version without guessing the date

A UUID has hexadecimal groups in the form 8-4-4-4-12. Version 4 UUIDs use random bits rather than embedding an ordered creation timestamp. Do not sort them expecting creation order or infer the creator’s identity from the value.

Still enforce uniqueness in your application

Random UUIDs make collisions extremely unlikely, but database uniqueness constraints remain useful for catching duplicate imports and application mistakes. A UUID is an identifier, not a permission check: knowing a record ID must not bypass authorization. Use an application-specific security design for reset links and access tokens.

Do you upload my data?

This tool runs in your browser. Inputs and results are not sent to our server. Closing or refreshing the page clears your work, so save any results you need.