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Adding AVIF to EPUB 3.4

Status: Open.

#1642 In w3c/epubcheck;

· iherman opened on Oct 6, 2025

A png when passed thorugh the epubcheck, gets mistaken for JPEG, even tho the magic bytes are correct (when using xxd or hexdump)

Status: Open.

#1641 In w3c/epubcheck;

· Mathusan opened on Oct 2, 2025

Context menu item request

priority: lowTo be processed when time allowsTo be processed when time allows

status: in discussionThe issue is being discussed by the development teamThe issue is being discussed by the development team

type: featureThe issue describes a new feature requestThe issue describes a new feature request

Status: Open.

#1639 In w3c/epubcheck;

· GeorgeKerscher opened on Sep 11, 2025

URL normalization of OCF resources

status: in discussionThe issue is being discussed by the development teamThe issue is being discussed by the development team

type: specThe issue is related to a Specification updateThe issue is related to a Specification update

Status: Open.

#1638 In w3c/epubcheck;

· rdeltour opened on Sep 9, 2025

role="doc-pageheader” fails to validate

status: in discussionThe issue is being discussed by the development teamThe issue is being discussed by the development team

type: specThe issue is related to a Specification updateThe issue is related to a Specification update

Status: Open.

#1619 In w3c/epubcheck;

· Lululalu opened on Jul 23, 2025

· 

Next maintenance release

Allow Internationalization Tag Set attribute in EPUB

spec: EPUB 3.xImpacting the support of EPUB 3.x specificationsImpacting the support of EPUB 3.x specifications

status: ready for implemThe issue is ready to be implementedThe issue is ready to be implemented

type: specThe issue is related to a Specification updateThe issue is related to a Specification update

Status: Open.

#1616 In w3c/epubcheck;

· iherman opened on Jun 2, 2025

· 

EPUB 3.4

Some Messages Codes are missing in the online documentation

status: acceptedReady to be further processedReady to be further processed

type: docsThe issue is related to documentationThe issue is related to documentation

Status: Open.

#1613 In w3c/epubcheck;

· kantoche opened on May 29, 2025

JSON Output for OPF-015 Seems to Be Missing Location Entries

Status: Open.

#1611 In w3c/epubcheck;

· pjkaufman opened on May 15, 2025

Check for multiple occurence of OPF guide references with type="text"

priority: lowTo be processed when time allowsTo be processed when time allows

status: needs reviewNeeds to be reviewed by a team member before further processingNeeds to be reviewed by a team member before further processing

type: improvementThe issue suggests an improvement of an existing featureThe issue suggests an improvement of an existing feature

Status: Open.

#1609 In w3c/epubcheck;

· mkraetke opened on May 6, 2025

Image Dimensions

status: acceptedReady to be further processedReady to be further processed

type: improvementThe issue suggests an improvement of an existing featureThe issue suggests an improvement of an existing feature

Status: Open.

#1608 In w3c/epubcheck;

· R1148 opened on May 3, 2025

Add a new Vocab type for permissive enum-based vocabularies

priority: lowTo be processed when time allowsTo be processed when time allows

status: ready for implemThe issue is ready to be implementedThe issue is ready to be implemented

type: improvementThe issue suggests an improvement of an existing featureThe issue suggests an improvement of an existing feature

Status: Open.

Feature

#1587 In w3c/epubcheck;

· rdeltour opened on Dec 27, 2024

output an all errors to XML document file

status: acceptedReady to be further processedReady to be further processed

type: improvementThe issue suggests an improvement of an existing featureThe issue suggests an improvement of an existing feature

Status: Open.

#1489 In w3c/epubcheck;

· jarupxx opened on Mar 6, 2023