Non-sequential, random code generation
Use a basic template to generate random non-sequential codes. New and improved version uses an in-memory SQLite database and it's now a whole lot faster.
As far as the template goes, use
X to stand in the place of a letter and
0 for a number.
So if you give a template of
X00 you'll get codes like
If you actually want an X or 0 to appear in the code then you're out of luck.