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UUID Generator

Generate random UUID version 4 values in your browser, one at a time or in a batch, and copy them for your projects.

Use the tool

How many UUIDs, 1 to 20

UUID version 4 values are random. They are unique in practice, but they are not guaranteed unique by any central registry.

A UUID is a long random identifier used in code, databases and APIs when a simple counting number is not enough. Version 4 UUIDs are random, which makes them useful for IDs that must not clash across systems.

This tool generates UUID version 4 values in your browser, one at a time or in a batch of up to 20, and lets you copy them straight into your project.

How to Use This Tool

Enter how many you need: type a number from 1 to 20.
Click Generate UUIDs: the values appear in the output box.
Click Copy Output: paste them into your code, database or test data.
Generate again for fresh values: each click creates a new random set.

Good Practice Tips

Do not use UUIDs as secrets: a UUID is an identifier, not a password or a secure token.
Store them as text: most databases store UUIDs as text or as a native UUID type, not as plain numbers.
Check your format: some systems want lowercase UUIDs without braces, which is the format this tool outputs.

Frequently Asked Questions

What is UUID version 4?

Version 4 means the UUID is generated from random numbers, with version and variant bits set to fixed values in the standard format.

Are generated UUIDs guaranteed unique?

No central registry guarantees it, but random version 4 UUIDs are unique in practice for normal use.

Can I use a UUID as a password?

No. A UUID is an identifier, not a secret. Use a proper password or token system for secrets.

Is my input uploaded to a server?

No. Everything runs in your browser on your own device, so nothing leaves your computer.

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