Cappriola

Free tool

UUID Generator

Create UUID v4 identifiers for tests, databases, logs, prototypes and software development workflows.

ef55e4b9-2644-4d99-a7c6-6ce35f84a1fa
060d3a53-de22-42a4-b574-7f03db7c1c60
676b46e2-f380-454c-b5f3-27eaa81ed41f
f6b4ccea-cd60-4b28-af09-9d70cdc14e92
2a4773c1-12eb-4927-aa37-2a57bc0a3540

How to use

  1. Fill in the fields for your use case.
  2. Review the result generated by the tool.
  3. Adjust values to compare scenarios or produce a cleaner output.

Example

Generate several UUIDs when you need mock IDs for API tests, seed data or local development.

What is included

  • UUID v4 generation.
  • Multiple IDs at once.
  • Quick copy for the full list.

Frequently asked questions

Is a generated UUID unique?

UUID v4 uses strong randomness and has an extremely low collision chance, though no random generator can promise absolute uniqueness.

Can I use these in production?

For many systems, UUID v4 is appropriate. Check your database, ordering and security requirements.

Are UUIDs stored?

No. They are generated in your browser and are not stored by the site.