While something to think about, well.. I doubt it's really needed right away? I have the impression the web site owner, who I believe is also the only programmer, has a lot of his plate as it is. There is a fairly easy work-around however.
On Windows anyway, it's an option within MS Paint, at least since Windows 7, if not since Vista. It's one of the icons near the Select tool, where you'll see options to rotate clockwise 90º, counterclockwise 90º, 180º, flip horizontal, and flip vertical. Again on Windows, even in File Explorer, there should be an option to rotate even without fully opening MS Paint if you right-click on the file.
No idea about MacOS, but I'd be very surprised if there isn't something similar, or they'd make it hard to find.
Hopefully this helps in the near term.
2 years
