EpubCheck – Validate your EPUB Books

EpubCheck is an open source tool to validate EPUB files (EPUB 2 and EPUB 3). Using EpubCheck, you can make sure that your book complies with the EPUB format’s specifications. EpubCheck is a command line tool, all detected errors are simply printed to stderr output stream.

Validating your book’s technical accuracy is as important as proofreading for grammatical and spelling errors. It helps to ensure your book looks attractive and performs well.

This software can detect many types of errors in EPUB. OCF container structure, OPF and OPS mark-up, and internal reference consistency are checked. EpubCheck can be run as a standalone command-line tool or used as a Java library.

The software validates a document by using a set of Checkers. They examine a particular portion of the EPUB file. As the tool examines the file, it uses an OCFChecker to validate the OCF structure, an OPFChecker to validate the OPF file, and so on.

Most of the software’s functionality comes from the schema validation tool Jing and schemas that were developed by IDPF and DAISY. To run the tool you need Java (1.6 or above, 1.7+ recommended).

Features include:

  • Use the software as a library in your Java application. EpubCheck public interfaces can be found in com.adobe.epubcheck.api package. EpubCheck class can be used to instantiate a validation engine.
  • Specify a validation profile to validate an EPUB (or single file thereof) against a specific IDPF specification. Current profiles include:
    • default: the default validation profile.
    • dict: validates against the EPUB Dictionaries and Glossaries specification.
    • edupub: validates against the EDUPUB Profile.
    • idx: validates against the EPUB Indexes specification.
    • preview: validates against the EPUB Previews specification.
  • Extract some information while parsing and checking an EPUB file.
  • Cross-platform support.

Website: github.com/IDPF/epubcheck
Support: Wiki, Mailing List
Developer: W3C EPUB 3 Community Group
License: MIT License

EpubCheck is written in Java. Learn Java with our recommended free books and free tutorials.

Return to e-book Tools Home Page


Ongoing series
Linux for StartersNew to Linux? Read our Linux for Starters series.
Free and Open Source SoftwareThe largest compilation of the best free and open source software in the universe. Supplied with our legendary ratings charts.
Linux ReviewsHundreds of in-depth reviews offering our unbiased and expert opinion on software.
Alternatives to GoogleAlternatives to Google's Products and Services examines your options to migrate from the Google ecosystem with open source Linux alternatives.
MicrosoftAlternatives to Microsoft's Products and Services recommends open source Linux software.
Linux System ToolsEssential Linux system tools looks at small, indispensable utilities, useful for system administrators as well as regular users.
Linux ProductivityLinux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.
Home Computer EmulatorsHome computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.
Now and ThenNow and Then examines how promising open source software fared over the years.
Linux at HomeLinux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.
Linux CandyLinux Candy opens up to the lighter side of Linux. Have some fun!
Best Free Android AppsBest Free Android Apps. There's a strict eligibility criteria for inclusion in this series
Programming BooksThese best free books accelerate your learning of every programming language
Programming TutorialsThese free tutorials offer the perfect tonic to the free programming books series
Stars and StripesStars and Stripes is an occasional series looking at the impact of Linux in the USA
Share this article