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

How to make a PDF file manually

PDF Files are very complex files and we always recommend you use a library such as JPedal when working with them. But it is...
Mark Stephens
1 min read

Who decides what is in the PDF file specification?

This used to be a really easy question to answer – Adobe. The PDF file format was invented by the co-founder of Adobe (John...
Mark Stephens
1 min read

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

Interesting PDF bugs – How wrong can the references…

I have been looking at a customer PDF file today which highlights how ‘elastic’ the PDF file specification can be…. In theory, all objects...
Mark Stephens
1 min read

PDF puzzlers – when is a return character significant…

The PDF file format is a very ‘flexible’ file format. You can put returns into the middle of a most objects. There is a...
Mark Stephens
41 sec read