I'm using the free Acrobat Reader to print out some pdf documents having very large top/bottom/left/right margins. I want to remove the margins (which are wasting too much space and making the fonts too small). I used to use Acrobat (the paid version having edit features) to crop the src pdf file manually. But since it is an old version it does not support new pdf format and I don't want to upgrade for such a simple use.

Is there any free way to crop/remove unwanted white margins from the printed pdf?

I am thinking to print the pdf files to a PDF Printer like the Bullzip PDF Printer and enlarge the output file manually so as to remove any white margin. But there does not seem to be such a feature in Bullzip PDF Printer. Is there any other virtual printer software that can be used for this purpose?