The conformance checker for EPUB publications
EPUBCheck is a command line tool. Unzip the downloaded package, open a terminal program, and start checking your EPUB files!
java -jar epubcheck.jar moby.dick.epub
Learn more on how to get started
EPUBCheck is open source, licensed under MIT.
EPUBCheck is a W3C project maintained by the DAISY Consortium.
EPUBCheck is translated in a varierty of languages.
You can help to contribute to the localization effort!
Looking for an app?
EPUBCheck is distributed as a command line tool or a Java library.
If you prefer using an app, see this list of third-party tools integrating EPUBCheck!