Latest EPUBCheck 5.0.0 preview is available!
We are pleased to announce the latest preview release of the next major version of EPUBCheck, v5.0.0. For the first time, this version fully implements the new rules in EPUB 3.3 (W3C Candidate Recommendation Draft).
We encourage users to effectively test this version of EPUBCheck in their production workflows to get ready for EPUB 3.3!
The full change log is available on the EPUBCheck preview release page.