Originally Posted by Hui Neng
PDF Scissors can do this:
"It is impressive - first it scans all pages and overlays them graphically on top of each other - that way you can easily find optimal cropping size. You can preview your cropping by going through each page and adjust.
It's a java App, probably runs on all platforms. Brilliant for quick croppings!"
There is also nice free online pdf croping service for pdf's under 10 MB that I use for cropping of ocr-ed pdf image, because results with non-ocred pdf scans were not that great and to crop pure textual pdf is trivial anyway.
You should split your pdf if it is too big and then upload those parts.