EPUB Validator (beta)

Submit an EPUB document for validation. Your file must be 10MB or less.

About this site

This site uses EPUBCheck to provide validation information for EPUB 2 and 3 documents. If you are creating commercial EPUBs in volume, you must install EPUBCheck instead of using this site.

Want to contribute? Go to https://github.com/w3c/epubcheck/wiki/Contribute.