UUID Generator — free online tool

Generate version-4 UUIDs for database primary keys or correlation IDs—bulk mode helps seed test fixtures.

Useful when you want a quick answer without pasting sensitive data into random chat bots.

How to use UUID Generator

Choose how many UUIDs you need on the UUID Generator.
Click generate for random version-4 identifiers.
Copy one UUID into your database seed or API test.
Use bulk output for fixture files, clearing the list before the next test run.

Practical tips

Use bulk mode to seed test fixtures or database rows with unique keys quickly.
Version-4 UUIDs are random, not sortable—use a time-based ID if you need ordering.
Never reuse a UUID as a secret; they are unique but not unguessable in the security sense.

Limitations

UUID Generator uses browser randomness suitable for everyday passwords and test IDs—not certified for regulated cryptography audits.

Privacy & data

We do not run a database on this static site. Text and generated output exist only in your tab until you close or refresh the page.

Frequently asked questions about UUID Generator

Is the UUID Generator free on Webtoolshop?

Yes. There is no sign-in and no paywall on this page. We may show advertising on some layouts to cover hosting.

Can I use the UUID Generator on a phone?

Yes for light tasks. Very long pasted text, huge images, or multi-megabyte PDFs are easier on a laptop with more memory.

Why did the UUID Generator fail or look wrong?

Try a smaller file, fewer pasted characters, or an updated browser. Extensions that block scripts or downloads sometimes interfere—test in a private window if results never appear.

Does Webtoolshop store text I paste into the UUID Generator?

We do not run a database on this static site. Text and generated output exist only in your tab until you close or refresh the page.

How many