Invented by Adobe Systems over 20 years ago, the Portable Document Format (PDF) is now an open standard for electronic document exchange maintained by the International Organization for Standardization (ISO). When you convert documents, forms, graphics, and web pages to PDF, they look just like they would if printed.

PDF

What is a PDF dictionary?

A PDF file is composed of many objects, each identified by a unique object number and generation number. Objects begin with the object number...
Mark Stephens
1 min read

What are CID fonts?

Understanding CID Fonts in PDFs CID fonts play a crucial role in supporting Asian and multi-byte character sets within PDF files. This article explains...
Mark Stephens
1 min read

How is text stored in a PDF file?

Text is defined in PDF files by a Font object and a set of TJ commands. So you will see something like this in...
Mark Stephens
55 sec read

How does image color depth work in PDF files?

This article is all about color in PDF images, and exactly what the depth of an image means in practice. All PDF images will...
Mark Stephens
59 sec read

What is an Indexed Colorspace in a PDF file?

Introduction Indexed colorspaces are a very useful way of reducing the amount of memory and space needed when they only have a certain number...
Mark Stephens
1 min read

Is JPedal free?

There was an interesting question posted on stack overflow asking ‘Is JPedal free?’ It is a intriguing question so let us unpack it and...
Mark Stephens
1 min read