UUID Generator
Generate v4 UUIDs / GUIDs in bulk · free, no signup
Free UUID / GUID Generator
A UUID (universally unique identifier), also called a GUID, is a 128-bit value used to label records, files, sessions and devices without a central authority. Version 4 UUIDs are random, which makes collisions astronomically unlikely.
Generate a single UUID or a whole list, then copy or download it. Options let you use uppercase letters or remove the hyphens to match the format your database or API expects.
Bulk generation
Create up to 1,000 UUIDs at once.
Format options
Uppercase, no hyphens and braces.
Secure randomness
Built on the browser's crypto random generator.
Copy or download
Copy the list or save it as a text file.
How to use it
- Choose how many UUIDs you need.
- Pick the format options.
- Click Generate.
- Copy or download the results.
Frequently asked questions
What is a UUID v4?
A UUID made from random numbers, formatted as 8-4-4-4-12 hexadecimal characters.
Can two UUIDs be the same?
Theoretically yes, practically no. The chance of a collision is vanishingly small.
Is a GUID different from a UUID?
No. GUID is Microsoft's name for the same identifier standard.
Are UUIDs safe to use as database keys?
Yes, though they are larger and less sortable than integer IDs.