A better choice might be something like Zenfolio (there are lots of these types of services). Some of these services do that processing for you, and also give you a marketplace for people to buy prints / photo books / etc. Source: about 1 year ago

I think Zenfolio https://zenfolio.com is great! You can create a website of your own, as well as have password protected client galleries. It also integrates seamlessly with MPIX and Bay Photo which both have great products! I build websites and it’s so not worth trying to do your own site when you look at the features and the prices and integration of the labs you get with Zenfolio. Source: almost 2 years ago

I had someone take a picture of me on a white wall and uploaded in on this: https://photoaid.com/ to crop & make it meet visa guidelines. I think the website did the cropping for me. They also have real humans check whether your photo meets all the requirements. It was accepted for my OPT application!! Source: about 2 years ago