Last Updated on July 2, 2023
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).
- 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.
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