App for resizing from customer uploaded Images after checkout

[Dierk]

Hi,

I´m looking for an app that automatically resizes Images, that were uploaded by the customers. Preferably after checkout. We sell chocolates were you can ad pictures to certain designs. The customizing app exports the images with the wrong size. The ratio is correct but the resolution ist too high, as it´s guided by the uploaded images´ resolution.

Is there anything like that out there?

Dierk