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
The PDF File Format includes some very sophisticated features. One of the most interesting ones is the Blend Mode (introduced in PDF version 1.4).... Did you know that the second line of the PDF is a set of characters to make sure PDF files are treated as binary... Using the HTML5 File API to validate PDF Files Recently in my own time I have been familiarizing myself with the HTML5 File API.... 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... A PDF file consists of a ‘dump’ of PDF objects and a reference table defining where they are located in the PDF file and... 
