From: EPUBSecrets

This is another in our ongoing series of guest posts, this time from Rachel Comerford, co-chair of the EPUB 3 Community Group and a contributor to eprdctn. Her full bio is below.

What is EpubCheck?

The first question I ask anyone building an EPUB with or for me is this: Does it pass EpubCheck?

As a tool that validates EPUB files, EpubCheck has become the (loveable) bridge troll that determines if a publisher or author’s product is ready to be released for sale. It can detect many types of errors in EPUB: OCF container structure, OPF and OPS markup, and internal reference consistency are all checked. EpubCheck can be run as a standalone command-line tool or used as a Java library.

As the tool upon which the whole ebook industry relies to validate ebooks,epubtroll EpubCheck 4.0.2 is anxiously awaiting an upgrade.

Read more at EPUBSecrets.