UUID Generator

Key features

• Generates RFC 4122 version-4 UUIDs via crypto.randomUUID, with a spec-correct getRandomValues fallback for older browsers.
• Batch sizes of 1, 5, 10, 25 or 50 from a single dropdown.
• Uppercase switch renders all hex digits in caps; Remove-hyphens switch produces the 32-character compact form.
• Copy all exports the whole list newline-separated; every row also has its own copy button.
• Stat tiles confirm how many UUIDs you have and which format is active.
• Regenerate re-rolls the entire batch — nothing is cached or persisted.

How it works

1. 1

   Choose how many

   Pick 1, 5, 10, 25 or 50 from the 'How many?' select — the list fills instantly.

2. 2

   Adjust the format

   Flip Uppercase and/or Remove hyphens to match whatever your database, config or codebase expects.

3. 3

   Regenerate if needed

   Press Regenerate to replace the whole batch with freshly random IDs.

4. 4

   Copy one or all

   Grab a single UUID with its row button, or Copy all to take the list newline-separated into your seed file.

Tips for better results

• 💡A v4 UUID carries 122 random bits — the odds of two ever colliding in your project are astronomically small.
• 💡Remove hyphens when a column or key has a strict 32-character limit; the value is otherwise identical.
• 💡Uppercase is purely cosmetic — compare UUIDs case-insensitively if they come from mixed sources.
• 💡Generate a batch before a data import so you can paste ready-made keys instead of scripting ID creation.

Frequently asked questions