About the UUID/GUID Generator
Generate random version 4 UUIDs — also called GUIDs — for database keys, test data, API requests and file names. Create one or a whole list at once, in uppercase or without hyphens, generated securely in your browser.
Frequently Asked Questions
How do I generate a UUID?
Click Generate; set How Many for a list.
What is a UUID?
A 128-bit universally unique identifier written as 32 hex digits in five groups, like 3f2b…-…
What is the difference between UUID and GUID?
They’re the same thing — GUID is Microsoft’s name for a UUID.
What is UUID version 4?
A UUID made from random numbers; the most widely used version.
Can two UUIDs be the same?
In practice no — the chance of a v4 collision is astronomically small.
Can I generate UUIDs in bulk?
Yes, choose how many you need.
Can I remove the hyphens?
Yes, tick Remove Hyphens.
Should I use UUIDs as database primary keys?
They work well for distributed systems; consider UUID v7 or ordered UUIDs for index performance.
Are the UUIDs generated securely?
Yes, using your browser’s cryptographic random generator.
Is the UUID/GUID Generator free to use?
Yes.