UUIDTools.com

Bulk UUID Generator

Random. 122 random bits. The default choice for most apps.

Decode
Options & format

Formatting is applied instantly in your browser. A GUID is a UUID: tick Uppercase + Braces for the Microsoft registry style.

API
https://uuidtools.com/api/generate/v4

Plain-text and JSON API docs: no key required.

About Version 4 UUIDs

Need many UUIDs at once for test data, fixtures, spreadsheets or a database seed? Set the count (up to 1,000), pick a version, and copy everything or download a .txt file.

Use the format options for one per line, comma-separated, quoted, uppercase or GUID style. The same results are available from the API as plain text or JSON.

Frequently asked questions

How many UUIDs can I generate at once?

Up to 1,000 per request in the browser and the API. Make multiple requests for more, or generate them locally with your language's UUID library.