UUID Generator

Generate version 4 random identifiers, up to 100 at a time, ready to copy or download.

The output will appear here.

How UUID Generator works

Generate version 4 random identifiers, up to 100 at a time, ready to copy or download.

Input Count
Output UUID values
Works done 3,946

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UUID Generator Details

UUID Generator produces random identifiers whose chance of colliding is effectively zero, as many at a time as you ask for.

Reach for it when a database row needs a primary key, test data needs a unique field, or a filename needs a suffix that will not clash.

Step by step

The steps line up with the interface:

  1. Type how many identifiers you want into the count field.
  2. Run the tool; the identifiers are listed one per line.
  3. Copy the list or download it as a .txt file.

Technical details

How generation behaves:

  • Between 1 and 100 identifiers per run, defaulting to 5.
  • Identifiers are version 4: random, unordered and carrying no timestamp.
  • Randomness comes from the browser's crypto.randomUUID.
  • Generated values are never sent to a server and never stored.

When to choose this tool

This page covers unique identifiers. For a readable URL segment use the Slug Generator, and for a random secret use the Password Generator.

Version 4 identifiers do not sort, so insert performance can suffer where a database index expects an increasing key. The tool keeps no history: reload and the list is gone.

Small things that help

  • Pair the identifier with a short prefix in filenames, or the names become unreadable.
  • For test data, pull 100 at once and paste them straight into a spreadsheet.
  • When using identifiers in logs, carry one value through the whole request to trace it.

Where your data is processed

Because the input never reaches the server, nothing is left behind when you close the page. No request is made beyond the usage counter, and its body carries only the count itself.

Frequently asked questions

Type or paste your data into the Count field, run the tool, then copy or download the UUID values result.

Yes. While the text field is focused, Ctrl + Enter (Cmd + Enter on macOS) runs the tool.

You can copy the output or save it as a text file with the download button. The file name is based on the tool name.

The tool shows the error message in the output area. Fix the input and run it again.