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Sigil is a free, open source, multi-platform ebook editor that uses Qt (and QtWebEngine). It is designed to edit books in ePub format (both ePub 2 and ePub 3).
Features
- Free and open source software under GPLv3
- Multi-platform: runs on Windows, Linux and Mac
- Full UTF-16 support
- Full EPUB 2 spec 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 with full support for all possible metadata entries (more than 200) with full descriptions for each
- 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 FlightCrew EPUB validator
- Embedded HTML Tidy: all imported files have their formatting corrected, and your editing can be optionally cleaned
What’s New
Bug Fixes
- fix Checkpointing to work with dulwich version 0.20.46+
- fix css value parsing when !important is used
- EmbeddedPython fixes to work with Python 3.11 and later (thank you sharkcz)
- leave cursor position unchanged if nothing found when search groups of files
- make all Numeric items in Reports align right
- add support for thousands separator to Reports
- allow blank dc:language values to prevent crashing (as Sigil-1.9.10 did)
- allow unknown language codes to pass through MetaEditor
- MetaEditor under epub2, allow custom opf scheme values
- prevent duplicate spaces when reformatting CSS in import, charset and namespace
- better prevent random OPF attribute order changes to simplify Checkpoint diffs
- fixed file menu Print Preview for xhtml and image tabs
- prevent plugins from crashing Sigil by deleting last xhtml file in epub
- fix issue where images/css could not be properly added in an epub3 with no css files
New Features
- allow user to edit Checkpoint descriptions for clarity via Checkpoint menu
- add ability to show the Checkpoint Change Log via Checkpoint menu
- update to Hunspell 1.7.2 (released in December 2022) for spellchecking
- update to latest zlib-1.2.13 for latest security fixes
- move completely away from ever using OS system tmp folder for storing Sigil wip files
- instead create a new “workspace” folder inside Sigil Preferences folder
- added ability to Print Preview and Print contents of Sigil’s Preview window