UUID Generator Free — Generate unique UUIDs v4

What is UUID Generator?

UUID Generator is a free browser-based tool that runs entirely in your browser. No file uploads, no account needed, and no data stored. Fast, private and always free.

This tool lets you generate unique uuids v4 without installing any software or creating an account. Everything runs directly in your browser for maximum privacy. Your files and data never leave your device.

Use it for quick tasks at any time from any device — desktop, tablet or mobile. No subscription, no ads, no limits.

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Instant results

No server processing or wait

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100% private

Files stay on your device

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Always free

No subscription or fees

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Mobile ready

Works on any device

How to use UUID Generator

Open the UUID Generator tool
Enter your input data or upload your file
Configure the settings for your use case
Download or copy the result

Why use OnlineToolsPlus?

OnlineToolsPlus processes everything locally in your browser. Your files, text and data never leave your device, which eliminates server-side privacy risks. With 200+ free tools covering PDF, image, AI writing, developer utilities, calculators, SEO, color tools and more, there is no need to juggle multiple subscriptions or install software.

Frequently asked questions

What is a UUID?

A Universally Unique Identifier is a 128-bit identifier formatted as 32 hexadecimal characters in five groups. They are designed to be globally unique without requiring a central registry.

What version of UUID does this generate?

UUID version 4, which is randomly generated. It provides approximately 5.3 x 10^36 possible values, making accidental collisions practically impossible.

Can I generate multiple UUIDs at once?

Yes. Specify how many you need and the tool generates them all.

Are generated UUIDs truly unique?

With 2^122 possible version 4 UUIDs, the probability of collision is negligibly small for any practical application. They are considered unique for all real-world purposes.

What are UUIDs used for?

Database primary keys, session identifiers, API request IDs, file names, configuration identifiers, and any situation requiring a unique identifier that can be generated independently on different systems.

Does it work offline?

Yes.

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Last updated: April 11, 2026

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