Sigil 2.2.0

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!

Sigil 2.2.0 changelog:

New Features

add support for Windows live switching from dark to light and light to dark modes
add support for Linux kde and gtk3 live switching from dark to light and light to dark modes
add new environment variable: SIGIL_PREVIEW_TIMEOUT (in milliseconds) to allow user control of the Preview updating intervals, valid range 100 - 10000. default value: 1000. Set only once at Sigil startup.
add new Find and Replace targets: Selected SVG files, Selected Javascript Files, and Selected Misc XML
add new Find and Replace Regular Expression menu option: Unicode Property (*UCP)
add ability to rename files when new name is just a case variant on case insensitive filesystems
extended the number of clips that can be assigned to toolbars (total now of 60 clips supported)
Accessibility improvements:
add abiity to highlight the widget with current focus (Thanks BeckyEbook)
add ability to double text insertion point width throughout Sigil
Extend Python Plugin Interface with info on preferred font mangling information
replacement strings in F&R can now use \x{hhhh} hex escape codes to represent unicode characters numerically

Other Changes

There will be no more built-in HighDPI settings in Sigil's prefs. If you have special needs in that regard, you can still set your own Qt highdpi environment variables.

Bug Fixes

reformating css with multiline now adds space after selector comma
add in bulk resource move and use bulk delete to handle epubs with thousands of files
add in bulk resource rename to handle epubs with thousands of files
if Replace has focus and Find done, CodeView should get focus (Thanks BeckyEbook)
fix dark mode Toolbar continuation symbols for Windows (Thank you BeckyEbook)
fixed bug in Save-As context menu action in ImageTabs
fix dark mode live switching on macOS issues qith QTreeView and QStandardItemModels
fix bug in missing CharToEntity in the Create TOC process
fix TabManager tab close symbol on macOS to match that used in dockwidgets
use Unciode NormalizationForm C inside Sigil and for io
fix macOS stuck at Maximized size issue