I happen to have dozens of pdfs with over 500 pages in each. They written content in all these pdf occupy a small portion in the center of the page leaving a lot of margin outside of the page. This shrinks the character size. I am trying to see if there is a way to stretch the written content to occupy more page (zoom in with constant page size). Is there any pdf tool that can help me trim the top/bottom/right/left margin in bulk? Something that takes pdf as input and page ranges to modify this way?

See the image to understand my scenario.

Thanks

My suggestion is use the venerable "Briss"