Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems.

PDF File Format

How to edit PDF files using Incremental Updates

Yesterday, Mark wrote about how wrong references tables can be. He’s also previously written about how to edit PDF files by adding a second...
Sam Howard
1 min read

PDF teasers – how would you handle this stack…

This article arose as a result of debugging a customer file which was not displaying properly. There are many PDF files out there which...
Mark Stephens
59 sec read

Understanding the PDF file Format – Multiple trailers on…

A PDF file consists of a ‘dump’ of PDF objects and a reference table defining where they are located in the PDF fille and...
Mark Stephens
1 min read

Understanding the PDF file format – Embedded CMAP tables

Every glyf inside a PDF file can have a display value and a different extraction value. This is useful because often you need to...
Mark Stephens
2 min read

Understanding the PDF file Format – ActualText

Text is defined in the PDF file format as a display value (normally what you see onscreen) and an extraction value. It is useful...
Mark Stephens
40 sec read