Open the UUID Generator
Generate random version 4 UUIDs (GUIDs) instantly. Create one or up to 1,000 at a time, choose uppercase or no hyphens, and copy or download the list.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Your input
The actionA real example, step by step
Real data entered into the UUID Generator, one screenshot per step. Nothing is mocked up.
Open the tool
The UUID Generator opens ready to use, nothing to install or sign up for.
Enter your data
Real input used here: How many? (1-1000) 5.
Press Generate UUIDs
The UUID Generator shows the result straight away, below the same form.
What is the UUID 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.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Create up to 1,000 UUIDs at once.
Uppercase, no hyphens and braces.
Built on the browser's crypto random generator.
Copy the list or save it as a text file.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This utility | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
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.
Are UUIDs really unique?
In practice yes — the chance of two random v4 UUIDs colliding is astronomically small.
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