Connect and share knowledge within a single location that is structured and easy to search. I've been wanting to see the insides of a PDF for a while, like, the raw source code of it so I can look at it. Any way of doing that? Looking at the raw code of PDFs will not serve you much unless you also have an idea about its internal structure.
You should get yourself a copy of the official PDF reference download PDF , and you should have read some introductionary article such as this [gone] or this to begin with. Even after such a preparation, you'll not discover much useful when staring at the raw code. Because PDFs usually will contain parts which are "filtered" that means: compressed. Jay Birkenbilt's qpdf is a very useful commandline tool available for Linux, Mac OSX and as source code, under the open source Artistic License , which can unpack most filtered content and re-organize the internal structure in a way that gives you much more insight into it all objects are numerically ordered, etc.
The commandline to achieve this is:. This one even comes with a GUI if you prefer that , while still allowing you access to the internal structure and "raw" PDF code.
Use a Hex editor. If the purpose is just to look into the file, then any simple text editor will do, ex, Notepad. PDF is just a text based format, including embedded content byte streams. Raw PDF looks like this:. What you see are basic COS objects like name, dictionary, stream and so on.
All objects are described in PDF standard, see section 7. In addition to the qpdf tool conversion into postscript might be helpful. PDF is a subset of PS. Usually its quite easy to figure out, e. You can either use pdf2ps or invoke ghostscript. When you generate your PDFs using pdflatex you can disable compression with an option. This makes the PDF more readable. That may be against the copyright of the developer or owner of the website. When you do copy the source code, make sure you have their permission.
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