Compress your epub

The ePub is quite a special zip file and you cannot just compress it. In this article we'll present the magic formulas without any special software.

Linux

zip -X0q mybook.epub mimetype; zip -Xr9D mybook.epub * -x mimetype

Mac

zip -X0q mybook.epub mimetype; zip -Xr9D mybook.epub * -x "*.DS_Store" -x mimetype

Windows

Use Windows explorer, right click, create an empty new compressed folder, drag the mimetype file into the compressed folder, drag the rest of the files into the compressed folder, change the extension .zip to .epub