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UUID Generator Documentation

Use the free UUID Generator →

Generate version 4 UUID strings using cryptographically secure randomness.

What does it do?

Generate version 4 UUID strings using cryptographically secure randomness.

How does it work?

Select Generate new UUID to create a random version-4 identifier with browser Web Crypto. The batch panel creates 1-500 identifiers locally. Generation is user-initiated rather than performed while rendering the server response.

When to use it
  • Generate a single UUID for a new record or identifier.
  • Generate a batch of UUIDs for seeding test data.
  • Copy a list of UUIDs directly into a script or spreadsheet.
Inputs and outputs
Input
Text, files, or values entered in the browser, depending on the tool.
Output
A result shown in the browser that can be reviewed or copied where supported.
Limitations
  • Random UUIDs make collisions extremely unlikely but do not guarantee uniqueness; enforce database uniqueness where required.
  • UUID v4 is not an authorization token, password, or proof of ownership. The tool does not check identifiers against any database.
Privacy and data handling

Inputs for this browser-side tool are processed locally and are not sent to SiteIndex. Normal page analytics may still be collected as described in the Privacy Policy. Read the Privacy Policy.

How to use it

  1. Select Generate new UUID and copy the displayed value.
  2. For a list, expand Batch generate and enter an integer count from 1 to 500.
  3. Select Generate batch and use Copy all to copy one identifier per line.

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