Sigil 1.3.0

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!

New Features (since the 1.2.0 release):

Added FontTab to show a specific font by double-clicking in BookBrowser
Added Index Toolbar
Windows/macOS release build updated to Qt 5.12.9 with added bug fixes
Windows/macOS release build updated to Python 3.8.3
Added increased protection against evil epubs manipulating file: urls
Changes to support building with Visual Studio 2019 on Windows
Improved Windows Installer and handling of C++ runtime libraries
Updated Build instructions for MacOS, Windows, and Linux

Bug Fixes (since the 1.2.0 release):

Reorganized the source code to add a Widgets folder to reduce code duplication
Fixed spelling mistakes in MetaEditor user interface and xmlsanitycheck error messages
Fixed mistakes handling font files (and other files) whose names start with a "." on macOS/Linux
Improved embedded python error messages
Improved some error messages on epub load
Fix TabConnections to properly handle the new FontTab tabs
grew Preferences Colour widths to better handle non-English colour names (Thanks BeckyEbook)
Fixed bug in handling missing local links when using Add Existing ...
Removed all python2 remanants from the Sigil plugin and pythonlib code
If "Mend on Open" set, better handle import of huge file of of run-on lines
Bug fix for css url updating
Fix bug that prevented css updates from being shown in Preview without reload
Fix gcc8 build warnings where possible
Prevent BookBrowser's Rename and RERename from using URI delimiters ("#",etc) in file names