How to validate ePUB file

If you need to validate your ePUB file (version ePUB 2 and 3) try to use this tool: http://validator.idpf.org/ or download the tool from https://github.com/IDPF/epubcheck/releases (scroll down to Download area)


Using downloaded tool
1. Extract compressed file to a folder.
2. Move folder to root (for
 [windows]

xcopy C:\Users\%USERNAME%\Downloads\epubcheck-4.0.2\* C:\epubchek /s /i  

 [MAC]

mv ~/Downloads/epubcheck-4.0.2 ~/epubcheck

 c:\ on windows or to /~  on Mac
3. Open command line (terminal on Mac)
4. Navigate to folder

 [windows]

cd c:\epubchek 

 [MAC]

cd ~/epubcheck

5. Run command line to execute tool

java -jar epubcheck.jar [path-of-your-epub-file]

ex:

 [windows]

java -jar epubcheck.jar C:\Users\%USERNAME%\Desktop\my-file.epub

 [MAC]

java -jar epubcheck.jar ~/Desktop/my-file.epub