UUID Generator

Generate one or many cryptographically random UUID v4 values.

FREE - NO SIGN-UP - RUNS ON YOUR DEVICE

Runs locally in your browser

  • Liveresult
  • 0uploads
  • 1 tapto copy
  • Freeno account
In practice

What you can count on

  • 0uploads
    • Your input stays on this device
    • Nothing is sent for processing
  • Liveoutput
    • Results update in the working area
    • Change inputs and compare instantly
  • 1 tapto copy
    • Copy the result
    • No account or install needed
Specification

UUID Generator at a glance

Input
The number of UUID values you need.
Output
One or many RFC 4122 version 4 UUIDs
Method
crypto.randomUUID, in your browser
Price
Free
Where processing happens
On your device
How to

How to use UUID Generator

  1. 1

    Set how many

    Choose the number of identifiers you want in this run.

  2. 2

    Generate the list

    Press the generate button. Version 4 identifiers come from crypto.randomUUID in your own browser and appear underneath.

  3. 3

    Copy the whole list

    One Copy all button takes the whole list to your clipboard.

Questions

Frequently asked questions

Does this work without uploading anything?

Yes. The tool processes your input inside the browser tab. Nothing is sent to a processing server or stored in an account.

Can I change the result before copying it?

Yes. Adjust any available control and the result updates. Copy it only when the output matches what you need.

Which browsers are supported?

Current versions of Chrome, Edge, Firefox and Safari support the browser features used here. Very old browsers may lack a required API.

Background

What a version 4 UUID is for

Version 4 is 122 random bits taken from the browser cryptographic generator. A collision is not impossible, only unlikely enough that no application plans around one.

  • A UUID is an identifier, not a secret. Anything a stranger must not guess needs a password, not an ID.
  • The values are made in this tab and never recorded, so nothing about them leaves your device.

Full specification

Specification of the UUID Generator tool
InputThe number of UUID values you need.
OutputOne or many RFC 4122 version 4 UUID values.
Methodcrypto.randomUUID for secure browser-generated randomness.
PriceFree. Supported by clearly labeled ads outside the working area.
Where processing happensIn your browser tab. Your input is never uploaded.
Next step

Keep going with the same files

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