How to use
- Enter how many UUIDs you want to generate (1 to 1000).
- Click Generate to create a fresh batch of random UUID v4 values.
- Review the list, with one UUID per line, in the output box.
- Click Copy to copy all UUIDs to your clipboard, or Generate again for a new set.
Frequently asked questions
What kind of UUIDs does this generate?
It generates random RFC 4122 version 4 UUIDs (also called GUIDs), the most widely used type. Each value is 36 characters in the standard 8-4-4-4-12 hyphenated format.
Are the generated UUIDs unique?
Version 4 UUIDs are random 122-bit values, so the chance of a collision is astronomically small. For any realistic use — database keys, session IDs, file names — you can treat them as unique.
Is anything uploaded to a server?
No. Every UUID is generated entirely in your browser using local JavaScript. Nothing is sent anywhere, so the identifiers stay completely private on your device.
How many UUIDs can I generate at once?
You can generate between 1 and 1000 UUIDs in a single batch. Just enter a number in that range and click Generate to get the full list.
How random and secure are the UUIDs?
The tool uses the browser's built-in secure random source (crypto.randomUUID, with a getRandomValues fallback), the same cryptographic generator recommended for production use — not a weak Math.random().
Can I copy all the UUIDs at once?
Yes. The output lists one UUID per line, and the Copy button places the entire list on your clipboard in a single click so you can paste it straight into your code, spreadsheet, or config file.
About this tool
Generate one or many random RFC 4122 version 4 UUIDs in your browser, then copy them in one click. Uses secure crypto randomness and runs fully privately on your device.