How to debug epub?

Question

I've written an ePub generator by using ZipArchive in .NET and looking at the spec (in Wikipedia) & a example.

It doesn't work! But I only get a generic error so I'm unable to fix anything from here.

Where could I go to upload my ePub and be told what is wrong with it? Or is there a tool that is better for it? I'm currently using Adobe ePub reader...

Answer 1

I realize this is an old question, but in case others come across this I wanted to contribute. The IDPF which is responsible for the ePub standard has a tool for checking ePubs called epubcheck. It can be found at https://github.com/IDPF/epubcheck.

In addition, they have their own online validator that uses epubcheck. It is located at http://validator.idpf.org/

Answer 2

There are two basic black box approaches.

First: Generate a file and put it into a validator.

Second: Take a set of in- and output without using your code (other generator, example, do it manual). Then use a file comparison tool (maybe extract zip first).