Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems. The Specification refers to the specification that it needs to meet.

PDF file specification

Where do your PDF objects start in a PDF…

In theory this is a really easy question to answer for non-Compressed PDF files. There is a reference table to all the PDF objects...
Mark Stephens
May 8, 2013 1 min read

What are subsetted fonts in PDF files?

What are subsetted fonts? Subsetted fonts are fonts which  only include certain values. If you look at the fonts on your Computer you will...
Mark Stephens
Apr 12, 2011 2 min read