UUID Generator
Generate cryptographically random v4 UUIDs for your applications, databases, or test data. Choose how many you need — from a single ID to a bulk batch — and copy them individually or all at once.
How to use
- 1
Choose a quantity
Enter how many UUIDs you need, from 1 to 100.
- 2
Click Generate
A fresh batch of random v4 UUIDs appears instantly.
- 3
Copy what you need
Copy a single UUID with its own Copy button, or copy the whole batch at once.
Examples
- Generate 1 → e.g. 3fa85f64-5717-4562-b3fc-2c963f66afa6
- Generate 5 → five unique UUIDs, ready to copy as a list
Frequently asked questions
What is a UUID v4?
A UUID (Universally Unique Identifier) version 4 is a 128-bit identifier generated using random or pseudo-random numbers. The chance of two v4 UUIDs colliding is astronomically small, making them safe to use as unique keys without coordination.
How are these UUIDs generated?
This tool uses the browser's built-in crypto.randomUUID() function, which relies on a cryptographically secure random number generator — the same standard used by Node.js and modern browsers.
Is there a limit to how many I can generate at once?
Yes, up to 100 at a time, to keep the page fast and the results easy to scan and copy.
Are these UUIDs unique to me, or could someone else generate the same one?
Each UUID is generated independently and randomly. No data is sent anywhere, and the odds of any two v4 UUIDs colliding are negligible — about 1 in 2^122.