Sigil 2.8.0

Sigil is a versatile open-source EPUB editor with WYSIWYG editing, code view, regex search, TOC tools, and full metadata control.

Razvan Serea News Reporter Neowin · Jun 8, 2026 13:06 EDT with 0 comments

Sigil

Sigil is a free, open source, multi-platform ebook editor. It is designed to edit books in ePub format (both ePub 2 and ePub 3). It also provides features for advanced users, like direct XHTML, CSS and XPGT editing. You can use it to add any of the metadata entries supported by the EPUB specification and create a hierarchical Table of Contents.

Sigil key features:

Free and open source software under GPLv3
Multi-platform: runs on Windows, Mac, and Linux (note Linux only receives limited support)
Full UTF-16 support
EPUB 2 spec support with limited EPUB 3 support
Multiple Views: Book View, Code View and Preview View
WYSIWYG editing in Book View
Complete control over directly editing EPUB syntax in Code View
Table of Contents generator with multi-level heading support
Metadata editor
User interface translated into many languages
Spell checking with default and user configurable dictionaries
Full Regular Expression (PCRE) support for Find & Replace
Supports import of EPUB and HTML files, images, and style sheets,
Documents can be validated for EPUB compliance with the integrated
All imported files have their formatting corrected, and your editing can be optionally cleaned
Plugins!

Sigil 2.8.0 changelog:

New Features

create a separate Change Reading Order dialog for those who can not use drag and drop
create a Drop Zone for users who want to use drag and drop to add files to their epub
rewrite ImageTab to allow for basic image adjustments: rotate right, rotate left, crop, resize
allow users more control over Prettify using prettyprint.xml created in Sigil prefs.
update all CI github actions to the latest versions
add cability to de-nest the newly native nested CSS so that it will work with e-readers
in ImageViewer move image description to the top (Thank you BeckyEbook)
make ImageView open images fitted to its window automatically (Thanks BeckyEbook)
recognize more core mediatypes for image/jxl and imaage/avif from epub 3.4 spec
recognize json as a mediatype in Sigil in prep for epub 3.4 spec (Thanks drmhessler)
support json syntax highlighting in CodeView to support epub 3.4 spec (Thanks drmhessler)
add new epb3 tool menu items to safely add and remove the nav from the OPF spine

Bug Fixes

make sure assigned clip number is not editable in ClipEditor
greatly speed up All Files report generation in epub3s with manifest properties
greatly speed up Delete Used Media by caching current cover image
greatly speed up adding bulk resources to the OPF to speed up Add Existing ...
fix bug in Open With on MacOS not properly parsing arguments
fix bug in refreshing plugin toolbars (Thank you BeckyEbook)
fix bug in GetInfo not using the proper times symbol (Thanks BeckyEbook)
fix stripping out of css selectors with non properites (empty)
use resizeColumnsToContents to set DeleteUnunsedMedia and DeleteUnusedStyles column width
prevent user created custom metadata elements from breaking the lxml parser badly (Thanks BeckyEbook)
fix bug that stripped out custom metadata from epub before a save
use more standard shortcuts for for Previous and Next tab
stop Sigil tools from implicitly adding back nav to spine if not present