UUID
Makes a random UUID. Each press gives a new identifier.
Example: a code like 3f1c0a2e-7b44-4d1a-9c6e-1a0b8e5d2f77, 36 characters. The chance of the same code twice is practically none.
This page does not write to a database. Copy the code into your own project. There is no length choice: a UUID always has the same shape.