How to make UUIDs
Choose the version and how many you need, then copy or download them.
v4 or v7?
- v4 is fully random: the usual choice.
- v7 starts with the time it was made, so IDs sort in creation order. Databases store them more efficiently.
Can two UUIDs be the same?
In practice, no. There are so many possible v4 UUIDs that a clash is far less likely than a hardware fault.