UUID Generator — Free Online Tool
Generate cryptographically random version 4 UUIDs, up to 100 at once.
About UUID Generator
The UUID Generator creates version 4 universally unique identifiers using the browser's cryptographically secure random number source. These 128-bit IDs are perfect for primary keys, request IDs, file names, and anywhere you need a value that is unique without coordinating with a central server.
You can produce anywhere from one to a hundred UUIDs in a single batch and copy them all at once. Because generation happens locally with crypto.getRandomValues, the IDs are both high-quality and private, and results appear instantly with no signup or limits.
How to Use UUID Generator
- Enter how many UUIDs you need, from 1 up to 100.
- Click 'Generate' to create the batch of version 4 UUIDs.
- Review the list of UUIDs in the output box.
- Click 'Copy Result' to copy them all to your clipboard.
Key Features
Generates standard version 4 (random) UUIDs
Uses the secure Web Crypto random number source
Create from 1 up to 100 UUIDs in a single batch
One-click copy for the entire generated list
100% client-side processing with no uploads or limits
Frequently Asked Questions
What kind of UUIDs does this tool create?
It generates version 4 UUIDs, which are based on random numbers. The version and variant bits are set correctly so each ID conforms to the standard UUID format.
Are the UUIDs cryptographically random?
Yes. The generator uses crypto.getRandomValues from the Web Crypto API, which provides cryptographically strong random values, making accidental collisions extremely unlikely.
How many UUIDs can I generate at once?
You can create between 1 and 100 UUIDs in a single batch. If you enter a number larger than 100, the tool caps it at 100.
Are the generated UUIDs unique?
Version 4 UUIDs draw from a vast 122-bit random space, so the chance of generating a duplicate is so small it is effectively negligible for practical use.
Is anything sent to a server?
No. UUIDs are generated entirely in your browser, so nothing is uploaded and you can generate as many batches as you like for free.