How to use the UUID Generator
- Choose how many UUIDs you need.
- Pick formatting options.
- Click Generate and copy.
Formula used
Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where 4 is the version and y is 8, 9, a or b (the variant). The tool uses crypto.randomUUID() where available.
Frequently asked questions
Is a GUID the same as a UUID?
Yes. GUID is Microsoft's name for the same 128-bit identifier.
Can two UUID v4 values be the same?
In theory yes, but you would need to generate billions per second for many years to have a real chance.
Should I use UUIDs as database keys?
They work well for distributed systems. For high-insert tables, time-ordered IDs such as UUID v7 can index faster.
Are these UUIDs random enough for security?
They use the browser's secure random generator, but do not use UUIDs as passwords. Use the Password Generator.
How many can I create at once?
Up to 1,000 per click.
Our team builds and tests every tool by hand, checks each formula against official sources (IRS, HMRC, the Income Tax Department of India, CBSE, NHS, WHO) and reviews pages whenever rules change. Last reviewed on . Spotted a mistake? Tell us.