Recently I had made some screenshots from a website, and I obviously noticed that all the screenshots made had the exact same dimensions (992x1905 pixels) and I had vaguely heard before of software 'batch cropping' abilities with multiple image files.
I just wanted to share my pleasurable experience with it when using XnView MP's "Batch Convert"
and simply how efficient it is in XnView 
I did it with 50 image files (website screenshots) and it worked wonderfully.
here is a link to test just 4 of the original size screenshots before I batch cropped:
these were my settings I used:
Thank you XnView
vive la XnView