EPUB 3.2

What is EPUB?

EPUB® defines a distribution and interchange format for digital publications and documents. The EPUB format provides a means of representing, packaging and encoding structured and semantically enhanced Web content—including HTML, CSS, SVG and other resources—for distribution in a single-file container.

About EPUB 3.2

EPUB 3.2 is a minor revision of the EPUB 3 specification, which can be considered as a successor to both EPUB 3.0.1 and EPUB 3.1. EPUB 3.1 did not receive wide adoption due to incompatibilities with previous versions, so EPUB 3.2 was developed to be strongly backward-compatible with EPUB 3.0.1, while retaining many of the changes made in EPUB 3.1.

On May 8, 2019 the W3C EPUB 3 Community Group published EPUB 3.2 as a Final Community Group Specification.

EPUB Organization

EPUB 3.2 is defined by a set of individual specifications. The best starting point for learning about EPUB 3.2 is the EPUB 3 Overview. The organization of the specification documents is also explained in the EPUB 3.2 specification.

The EPUB 3.2 Changes document identifies the major changes made between EPUB 3.2 and EPUB 3.0.1.

How to Participate

The EPUB 3.2 specification is developed by the W3C EPUB 3 Community Group. All Working Group activities are conducted in an "open source" manner: the EPUB 3 Community Group project site is publicly accessible and contains a source code repository for specification and related work products.

All comments on EPUB 3 specifications should be submitted via the EPUB 3 issue tracker hosted on GitHub. (NOTE: you must login via a GitHub Account in order to submit an issue.)