@Sebastian thanks for sharing all that. no way would I use that site though. they get your documents and ip address, document metadata, and probably more; that's TMI for me personally.
the valuable output sorta kinda reminded me of using adobe pitstop, in the day.
I wonder if there is a standalone pdf foss app that measures pdf integrity? another way to check is to print the pdf to postscript but you'd still need preflight tools to get that data (maybe scribus?) but convoluted compared to just doing it now. all the other services they provide at that website I can do via gimp, office suite,scribus, pdfunite..
ps--this is the second time I've seen zathura mentioned in a week. maybe will try it. edit/format
