GUID generator
Pick a version, say how many, and take them away. Version 4 is what most people mean by a GUID; versions 1, 3, 5, 6, 7 and 8 are here too, along with the nil and max UUIDs. Nothing is uploaded: the randomness is your browser’s own, and the UUIDs never leave this tab.
Generate
122 random bits from the browser's CSPRNG. What most people mean by a GUID, and the right default unless you have a reason.
Result
5 UUIDs · version 4 · generated in this tab