Is it safe to use the UUID Generator online?

Yes — and ours is safer than most. Many free online tools quietly upload your files to their servers to do the work. We don't. Everything happens inside your browser on your own device, so your files never reach the internet. There's no upload step, no server copy, and no way for us (or anyone else) to see what you're working on.

Are my files uploaded to a server?

No. There's no server-side processing here. The whole tool is a tiny app that runs in your browser — we don't even have a server that could receive your files. You can confirm this by opening your browser's network tab while you use the tool: nothing leaves your device.

Do I need to sign up or pay?

No. There's no account, no email collection, no credit card. The tool is free to use as much as you want, on as many files as you want. We're supported by a few unobtrusive ads on the page — not by your data.

v4 is the random variant — no MAC address, no timestamp. Best for IDs that shouldn't leak metadata.

Will I ever get a collision?

v4 UUIDs have ~5.3×10^36 possible values. You're more likely to win the lottery 5 times in a row than collide on a sane number of generated UUIDs.

UUID Generator

Generate any number of v4 UUIDs (random) in your browser. Picks from `crypto.randomUUID` so they're cryptographically random. Format options for matching different style guides.

Features

v4 UUIDs from Web Crypto (truly random)
Generate up to 500 at once
Format options: standard, no-dashes, UPPERCASE, {braces}
Copy any individual UUID or the whole list

How to uuid generator

Pick count — How many UUIDs do you need?
Pick format — Standard is what most languages expect.
Copy — Hit Copy on the list, or click Regenerate for a fresh batch.

Frequently asked questions

Is it safe to use the UUID Generator online?: Yes — and ours is safer than most. Many free online tools quietly upload your files to their servers to do the work. We don't. Everything happens inside your browser on your own device, so your files never reach the internet. There's no upload step, no server copy, and no way for us (or anyone else) to see what you're working on.
Are my files uploaded to a server?: No. There's no server-side processing here. The whole tool is a tiny app that runs in your browser — we don't even have a server that could receive your files. You can confirm this by opening your browser's network tab while you use the tool: nothing leaves your device.
Do I need to sign up or pay?: No. There's no account, no email collection, no credit card. The tool is free to use as much as you want, on as many files as you want. We're supported by a few unobtrusive ads on the page — not by your data.
Why v4 specifically?: v4 is the random variant — no MAC address, no timestamp. Best for IDs that shouldn't leak metadata.
Will I ever get a collision?: v4 UUIDs have ~5.3×10^36 possible values. You're more likely to win the lottery 5 times in a row than collide on a sane number of generated UUIDs.