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

Understanding the PDF file Format – PDF Xref tables…

Understanding PDF Xref Tables: Xref tables are part of the original PDF file specification and one of the features which gives the PDF file...
Mark Stephens
1 min read

Using PDF files in unusual ways

One of my favourite features of the PDF file format is it’s flexibility. It goes way beyond a document format, it offers lots of...
Mark Stephens
1 min read

2 problems with corrupt PDF data streams

Part of the PDF file format is the ability to compress large chunks of binary data (fonts, image data, etc) using a variety of...
Mark Stephens
1 min read

Understanding the PDF File format – Form XObjects

Form XObjects (not be confused with forms which are buttons, checkboxes, buttons, etc) are an advanced feature of the PDF file format. They can...
Mark Stephens
52 sec read

Understanding the PDF file format – the color white…

White is a special color in the PDF file format. This is because of the way different colours work in the PDF file format....
Mark Stephens
1 min read