iBooks: Use EpubCheck to validate your EPUB books

EpubCheck is an open source tool that validates EPUB books. Using EpubCheck, you can make sure that your book complies with the EPUB format's specifications.

Validating your book's technical accuracy is as important as proofreading for grammatical and spelling errors. It will ensure your book looks good and performs well.

Validation in the iBooks Store is based on EpubCheck. All EPUB deliveries to the iBooks Store undergo the validation process. If your EPUB doesn't pass validation, you will receive errors at the end of the delivery process. You can access an online version of EpubCheck at http://validator.idpf.org

If you see error messages, follow these links:

Learn more about EpubCheck:

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