How do you debug PDF files?

Question

Many times I create a PDF either programmatically and there might be a problem with it, e.g. some specific letter might no show up well or I might have encoding issues etc.<

Answer 1

How about http://blog.didierstevens.com/programs/pdf-tools/ or http://podofo.sourceforge.net/about.html

For a list of PDF tools and libraries - http://en.wikipedia.org/wiki/List_of_PDF_software You may find other tools there that fit your needs.