UUID Generator
Create random version 4 UUIDs or time-ordered version 7 UUIDs, one at a time or in bulk, ready to paste into code, databases or spreadsheets.
OUTPUT
Runs entirely in your browser. Nothing you enter is sent to a server.
How to generate UUIDs
Set the number
Choose how many UUIDs you need, from 1 to 500.
Pick a format
Select v4 or v7, and decide on upper case and hyphens.
Copy the list
Copy the result or download it as a text file, one UUID per line. Generate creates a new set.
v4 or v7?
Version 4 UUIDs are completely random. Version 7 UUIDs start with a timestamp, so they sort in the order they were created, which keeps database indexes compact.
How unique are they?
UUIDs are generated with your browser's cryptographic random number generator. A v4 UUID has 122 random bits, so the chance of two ever colliding is negligible.
Frequently asked questions
Can I use these UUIDs in production?
Yes. They follow RFC 9562 and use the same secure random source as the browser's own crypto.randomUUID().
What's the difference between a UUID and a GUID?
None in practice. GUID is Microsoft's name for the same 128-bit identifier.
Are generated UUIDs stored anywhere?
No. They are created in your browser and disappear when you leave the page.