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Version 4 for pure randomness, version 7 for IDs that sort by creation time. Generated with your operating system’s own generator, so nobody has a list of them — and paste any UUID to see which version it is and when it was made.
122 random bits. Right for almost everything — the odds of a collision are not worth thinking about.
5 × version 4, generated on this device
Paste one you found somewhere and see what it actually is.
Set what you want and the result appears as you go. Nothing needs uploading because there is nothing to upload — you are describing what to make, not sending us anything.
Your browser does all the work locally, using your own operating system where randomness is involved. Nothing is requested from a server, so nobody else has a copy of what you made.
Take the result to your clipboard or save it as a file. Nothing is kept — refresh the page and it’s gone, so save what you need before you leave.