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UUID Generator

Generates random version-4 UUIDs with the browser’s Web Crypto API.

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How UUID Generator works

Generates random version-4 UUIDs with the browser’s Web Crypto API.

Try an example

Each UUID has the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx.

Good to know

UUIDs provide practical uniqueness, not a permission system or guaranteed collision impossibility.

Your privacy

Processing happens on this device for this tool. We do not upload your input, put it in share links or save it to your favourites. Closing this tab discards the working input; downloaded results remain wherever you save them.

When this tool is useful

Use UUID Generator when you need a quick, local result and want the rule or limitation visible alongside it.

How to use it

  1. Enter the input using the labels shown.
  2. Run the operation and review the result.
  3. Download or copy the result only after checking it.

Checks before you rely on the result

  • UUIDs provide practical uniqueness, not a permission system or guaranteed collision impossibility.
  • Keep the original input when the operation creates a new copy.
  • Use the related tools below when the next step needs a different format.

This page is maintained with the tool implementation and its deterministic tests. If the result looks wrong, report the issue with a non-sensitive example.

Read the UUID Generator instructions

A useful next step

JSON Validator
JSON Formatter
Base64 Decode
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