Developer tool · Free · No sign-up

UUID / GUID Generator

Generate one or multiple random UUIDs instantly in your browser.

Generated UUIDs

Click "Generate" to create UUIDs.

Configuration

How many UUIDs?

Max 100 at a time.

UppercaseRemove Hyphens

About this tool

A UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems. The term GUID is generally used by Microsoft developers. This tool generates RFC 4122 version 4 UUIDs completely in your browser, meaning no network requests are made and your generated IDs are completely private.

Key features

Batch Generation

Generate up to 100 UUIDs at once with a single click.

Format Options

Easily toggle between uppercase letters and remove hyphens.

One-Click Copy

Copy individual UUIDs or copy the entire batch to your clipboard.

How to use it

1Enter how many UUIDs you want to generate (up to 100).
2Toggle 'Uppercase' or 'Remove Hyphens' if you need a specific format.
3Click the 'Generate' button.
4Click the copy icon next to any UUID to copy it, or use 'Copy All'.

Common use cases

Generating primary keys for a database seed script.
Creating unique IDs for frontend React components or state objects.
Generating test tokens or mock data for API development.

Frequently asked questions

What UUID version does this tool generate?

This tool generates Version 4 (random) UUIDs using the browser's native `crypto.randomUUID()` API, which is cryptographically secure.

Are these UUIDs guaranteed to be unique?

Yes. The number of random version 4 UUIDs is so large (2^122) that the probability of generating a duplicate is effectively zero.

Is this tool free to use?

Yes, this tool is 100% free, runs entirely in your browser, and does not track or store the UUIDs you generate.

Private and free. Most of our tools run entirely in your browser, so the data you enter isn't uploaded or stored. There's no sign-up, and there never will be — they're built by the Fusion Trail Solutions team to be genuinely useful.