Sigil-0.9.16 Release

For the impatient, the installer files (and source) can be found as assets at the bottom of the Sigil Github Release page.

The first Official Release of Sigil ported to QtWebEngine to replace QtWebKit. And yes … Book View is still really gone. But the companion external editing application PageEdit is available for those who still need/want a similar functionality.

New Features

  • added epub3 tool: Generate NCX/Guide for epub2 e-readers
  • added epub3 tool: Remove NCX and Guide
  • added right click on link in Preview copies url to clipboard
  • added check mark indicator for current semantic set in AddSemantics dialog
  • opf guide is no longer used/updated in epub3, unless new epub3 tool menu is used
  • harden Sigil against maliciously crafted epub zip archives (aka zip-slip attacks)
  • added bk.getnavid() to the plugin framework and navprocessor.py for plugin devs
  • updated build documents to the latest Qt 5.12.3 and Python 3.7.2)

Bug Fixes

  • add missing title tag to nav head to make epubcheck happy
  • add dcterms:modified to empty epub 3 opf to keep epubcheck happy
  • fix lost Preview-CodeView sync when internal links are followed in Preview
  • fix macOS specific bug with newer versions of PIL (Pillow) used by plugins
  • no longer link against unused Qt frameworks when building (thank you eli-schwartz!)
  • prevent MS VC++ automatic reboots during Windows installs
  • prevent user from changing semantics of the nav file itself (it must be set to “toc”)
  • fix bug that dropped nav from spine when HTML TOC created

Be aware that Sigil-0.9.16 no longer enforces the need for epub3 to have and support an NCX for the purposes of backward compatibility with epub2 reading systems. There are, however, built-in tools to allow users to add backward compatibility features such as the NCX to their epub3.


Please check the Sigil Wiki for important Sigil support links, additional resource downloads, and platform-specific trouble-shooting tips/requirements.

Mac users should still download and install ActiveState’s ActiveTcl Community Edition to utilize plugins that use Tk/Tcl GUIs. More here.

The latest Sigil user guide can always be downloaded from its own repository.

PageEdit-0.7.1 Release

PageEdit-0.7.1

For the impatient, the binary files (and source) can be found as assets at the bottom of the PageEdit Github Release page.

PageEdit is a single page visual XHTML editor based on Sigil’s Deprecated BookView. It uses QtWebEngine instead of QtWebKit. It replaces much of what Sigil’s BookView could do plus it integrates the QtWebEngine Inspector which allows you to see the result of your visual editing live, and make changes via the Inspector interface itself.

PageEdit-0.7.1 contains minor updates from the initial beta release.

PageEdit can be easily launched from Sigil (any recent version) with its Open-With functionality or set as Sigil’s preferred external xhtml editor for fast launch by shortcut or icon.

Please remember that used as an External Editor for Sigil, requires that the user saves the file before exiting PageEdit and before further editing in CodeView to prevent loss of text/code.

The Windows installer for PageEdit is currently a self-extracting zipfile. Double-clicking it will cause it to extract its contents to a folder named PageEdit. Put the PageEdit folder anywhere you like. The PageEdit.exe file can be found in that folder. PageEdit requires that the VC++ 2017 64-bit runtime is installed (but does not include or install it itself). If Sigil-0.9.15 (or higher) is already installed, this will already be taken care of. Otherwise, you’re free to download and install the 2017 runtime yourself if you don’t use Sigil.

Sigil-0.9.15 beta Release

Sigil-0.9.15

For the impatient, the installer files (and source) can be found as assets at the bottom of the Github Release page.


A Beta Release of Sigil ported to QtWebEngine to replace QtWebKit

New Features

  • ported to use QtWebEngine (based on Chromium) to replace QtWebkit
  • QtWebEngine plugs many major memory leaks. Memory footprint should stay low to moderate.
  • QtWebEngine has ongoing security and support patches from Qt/Google/Chromium
  • removes the broken/deprecated BookView Editor that relied on QtWebKit
  • created PageEdit app (that uses QtWebEngine) that replaces much BookView functionality (see https://github.com/Sigil-Ebook/PageEdit)
  • allows the user to control use of javascript and remote access by epubs when editingto improve overall security
  • adds action to launch one preferred external xhtml editor via shortcut or icon (can be used to fast launch PageEdit app or any other xhtml open-with editor)
  • adds 5 more plugin quicklaunch buttons to main menu for a total of 10 (with all new icons! Thanks so much Becky!)

It also includes all of the fixes and updates from Sigil-0.9.14.

Be aware that Sigil-0.9.15 still enforces the need for epub3 to have and support an NCX so that it generates as backward a compatible epub as possible. This may be relaxed in future releases.


Please check the Sigil Wiki for important Sigil support links, additional resource downloads, and platform-specific trouble-shooting tips/requirements.

Sigil-0.9.14 Release

Sigil-0.9.14

For the impatient, the installer files (and source) can be found as assets at the bottom of the Github Release page.


This Sigil release is primarily to address performance issues and memory leaks, but there are a still some new features and other bug fixes as described below.

Bug Fixes

  • flush all changes to disk before creating a Report so that files sizes are correct
  • stop writing python bytecode to Program Files on Windows
  • remember cover semantics if cover image replaced by Add Existing…
  • fix issues with the Plugin Framework documentation epub
  • more memory leaks plugged
  • minor code cleanups

New Features

  • updated to Qt 5.12.3 with Annulen Webkit 5.212 with extra QtCursor memory leak fixes
  • updated to Python 3.7.2
  • updated build docs for macOS, Linux and Windows
  • build system now uses GNUInstallDirs to determine the best installation libdir on Linux
  • updated desktop integration for Linux
  • reduce PCRE cache size to help lower memory footprint
  • improve mapping of hunspell dictionary names to actual language names (thanks BeckyDTP)
  • add warning during import if unmanifested files exist in the epub zip archive
  • no longer requires use of non-breaking space entities (or any entities at all!)
  • special spaces are now visisble via syntax highlighting in CodeView
  • dropping epubs on Sigil.app no longer opens an extra empty epub on macOS
  • reload Preview only when needed to help prevent screen flicker and lower memory use
  • enabled Windows automated builds using Apppveyor
  • Windows releases now compiled with Visual Studio 2017
  • characters in HTML files report now uses gumbo for speed
  • allow user’s custom plugin icons to survive a plugin update

Sigil 0.9.14 will mark the last version that uses QtWebKit, and will be the last version to support editing in BookView. More here.

Be aware that Sigil-0.9.14 still enforces the need for epub3 to have and support an NCX so that it generates as backward a compatible epub as possible. This may be relaxed in future releases.


Please check the Sigil Wiki for important Sigil support links, additional resource downloads, and platform-specific trouble-shooting tips/requirements.

Sigil-0.9.14 release page and downloads.

Sigil-0.9.13 Released

Sigil-0.9.13

NOTICE: If after installing Sigil v0.9.13 (or higher), Sigil is crashing, won’t run correctly, or won’t start at all, check out this wiki notice before filing a report or asking for assistance.


For the impatient, the installer files (and source) can be found as assets at the bottom of the Github Release page.

This Sigil release is primarily to address bugs introduced by the upgrade to Qt5.11.2 and Python 3.7 in the previous releases and to revert the conversion of Sigil ini files to the utf-8 character encoding.

Bug Fixes

  • Revert change of INI encoding to utf-8 as QSettings very broken under utf-8 (commit 5484463)
  • Ensure all url attributes in shape-outside properties in CSS stylesheets get updated (commit de7b09f)
  • Workaround for lost cursor in qlineedit Qt bug (issue #398) (commit a8acab7)
  • Workaround missing File New, Open, Quit menus in Mac menubar if windows closed (commit 660a8aa)
  • Remove Icon from Tab for macOS only to workaround Qt bug (commit 5c91924)
  • Plug some memory leaks (commits: 85f78d7, cb9b833, 614d601, bf2f2f4, ebfb613, 4qa8f33)
  • Backport Qt 5.12alpha fix to prevent heap corruption due to qwidget next focus pointers (commit f5c7284)
  • Plug macOS memory leaks when closing a main window (commit fbf9015)
  • Put back quote in tag name bug fix lost in recent changes (commit ebd8c7c)
  • Disable Netscape Plugins being used in BookView and Preview Window (commit 79314ea)
  • Use custom version of qtwebkit with Qt 5.5 memory leak fix added back and no load plugins if disabled
    (see commits 94a28d7, 9f7ebba, and 4b968a9)

New Features

  • Add filename to tab tooltip (commit 27f8db7)
  • Clear memory caches when Preview changes to keep memory footprint smaller (commit 87b9247)
  • Update to MathJax 2.75, adds support for mathml mlongdiv, mstack, mcarries (commit 568aba5)
  • Reduce memory footprint by letting worker threads expire (commit c1ee7ea)
  • Reduce memory footprint by properly setting web page caches (commit 9f07cbe)

Be aware that Sigil-0.9.13 still enforces the need for epub3 to have and support an NCX so that it generates as backward a compatible epub as possible. This may be relaxed in future releases.


Please check the Sigil Wiki for important Sigil support links, additional resource downloads, and platform-specific trouble-shooting tips/requirements.

Sigil-0.9.13 release page and downloads.

Sigil-0.9.12 Released

Sigil-0.9.12

This is a buggy version of Sigil. Don’t use it. If you have good backups of your Sigil 0.9.10 (or earlier) preferences, roll back to Sigil 0.9.10 and restore your backed up preferences. If you don’t have backups of your Sigil 0.9.10 (or earlier) preferences, roll back to Sigil 0.9.10 anyway and recreate your preferences as best you can from within Sigil’s UI. Those preferences will be usable with the release of Sigil that follows 0.9.12.


This Sigil release is primarily to address bugs introduced by the upgrade to Qt5.11.2 and Python 3.7 in the previous Sigil release.

Bug Fixes

  • fix typo in cssreformatter that caused errors with @ fontface (issue #394)
  • workaround for qt bug affecting tab close buttons on Mac (commit f3b9399)
  • fix Mac Qt5 plugin dylibs that macdeployqt broke in Sigil-0.9.11

Be aware that Sigil-0.9.12 still enforces the need for epub3 to have and support an NCX so that it generates as backward a compatible epub as possible. This may be relaxed in future releases.


Please check the Sigil Wiki for important Sigil support links, additional resource downloads, and platform-specific trouble-shooting tips/requirements.

Sigil-0.9.11 Released

Sigil-0.9.11

This is a buggy version of Sigil. Don’t use it. If you have good backups of your Sigil 0.9.10 (or earlier) preferences, roll back to Sigil 0.9.10 and restore your backed up preferences. If you don’t have backups of your Sigil 0.9.10 (or earlier) preferences, roll back to Sigil 0.9.10 anyway and recreate your preferences as best you can from within Sigil’s UI. Those preferences will be usable with the release of Sigil that follows 0.9.12.


This Sigil release is a mix of bug fixes and new features for both epub2 and epub3 users. Some of the highlights for this release include:

Starting with Sigil-0.9.11, Sigil’s ini preference files will be utf-8 encoded to more easily allow users to manually edit them. NOTE: before upgrading to Sigil-0.9.11, please make and save a backup of your preferences files. There is no issue with the conversion moving forward, but if, for whatever reason, you need to roll back to an earlier version of Sigil, utf-8 encoded unicode characters in your ini files will not work with earlier versions of Sigil. So please be safe and make a backup just in case.

The Windows and Mac installers have been updated to use Qt5.11.2 and Python 3.7.

Restore ability to click in the Preview window to reposition to the same point in Code View while keeping the ability to follow links in Preview.

Allow users to maintain up to 5 external programs per file type with the Open With feature.

Sigil 0.9.11+ no longer supports Windows Vista.

Sigil 0.9.11+ no longer supports macOS 10.9 and macOS 10.10. macOS upgrades are available for free directly from Apple.

The specific changes/additions follow…


Bug Fixes

  • after mend and prettify – put cursor at enclosing tag if possible
  • allow both links in Preview and clicking in Preview to reposition CV
  • fix new cursor repositioning under new tab ala Spellcheck
  • fix prettyprinting of the mark tag in gumbo and sigil_bs4
  • fix crash when tagname illegally (for xhtml) includes single or double quotes
  • fix crash in Reports for non-wellformed xhtml that was okay under html5
  • fix deletion of multiple css files when Book View is open (Windows)
  • fix bug in reformat CSS with media queries
  • fix bug in closing some tabs needlessly when linking stylesheets
  • fix crash bug in gumbo parser under very strange circumstances
  • remove empty guide elements in epub2 opf as epubcheck now flags these
  • fix issue with index generation reordering spine entries under certain conditions

New Features

  • update official builds to use Qt 5.11.2 and Python 3.7
  • update internal Python modules to use latest versions
  • update Sigil’s gumbo parser to fix all known bugs and greatly speedup parsing
  • embed new project css_parser (fork of cssutils) as a python library to fix css parsing
  • Sigil no longer attempts to upgrade the VC++ runtime on Windows. It only installs the
    bundled VC++ runtime if there is no compatible version already installed
  • add support for internal but unmanifested opf metadata link resources under epub3
  • extend “Open With” context menu to allow up to 5 external editors per resource type
  • make format of all Sigil ini files to be utf-8 encoded to more easily allow user changes

Be aware that Sigil-0.9.11 still enforces the need for epub3 to have and support an NCX so that it generates as backward a compatible epub as possible. This may be relaxed in future releases.

Sigil-0.9.11 like its predecessors passed all of the following tests for epub3 support: iframe, img, audio, video , mathml, svg (except for svg support in the spine), javascript, and of course recognizing and allowing html5 specific tags like section, and etc. Sigil-0.9.11 also supports javascript based local-storage and display of embedded pdfs.


Download Location

The official location for downloading this Sigil release (and all official releases) is:

The latest version of the Sigil User Guide can be downloaded from: https://github.com/Sigil-Ebook/sigil-user-guide/releases/latest

Downloading binaries from anyplace else is simply NOT a good idea as they could inject anything into their own downloads. After downloading, please verify the downloaded binary exactly matches what was originally posted by running an SHA 256 checksum on the file before installing it. See the file Sigil-0.9.11-CHECKSUMS.sha256.txt for the correct checksums for each file and instructions for how to calculate a SHA 256 Checksum for your download. The Mac OS X Package has also been code signed with my Apple Developer signature.


Windows Users

If your current version of Sigil is 0.9.6 or earlier, it’s recommended (but not required) that you uninstall that version before installing 0.9.11. Some compiled Python files have had their file extentions changed (as well as the change to Python 3.7). As a result, there will be a lot of extraneous files left lying around if you just install the new over the old. It won’t cause any functionality problems, but if disk space is at a premium, you may want to clean things up a bit. You can do this by uninstalling Sigil at any time (even after 0.9.11 is installed) and reinstalling. Doing so won’t affect your any of your preferences, plugins, keyboard shortcuts, clips, saved searches, etc.

Linux Users

There are currently no official binary releases available for Linux on the Sigil Release page. Please check with your favorite distro’s software repositories to see if they have Sigil for installation via your OS’s package management system. If not, there are build instructions for compiling Sigil yourself in the source archive’s docs directory: https://github.com/Sigil-Ebook/Sigil/tree/master/docs

Don’t forget the FlightCrew plugin

Please note, the epub2 validator FlightCrew has been converted to a plugin for Sigil 0.8.900 and later.
This plugin has been updated for Sigil-0.9.3 (and later). It can be downloaded from the official Sigil-Ebook flightcrew repository if you have not already installed it.

https://github.com/Sigil-Ebook/flightcrew/releases/latest

Attention Mac OS X Users

Per the recommendation of http://www.python.org (see https://www.python.org/download/mac/tcltk/), due to bugs and the age of Apple’s internal Tcl library, you should also download and install ActiveState’s ActiveTcl Community Edition. To get the latest bug fixes, Sigil-0.9.11’s embedded Python has been linked with version: Tcl 8.6.4.1

We may not redistribute this Package with Sigil due to ActiveState’s binary non-redistribution policy.

So please, if you have not already done so download and install this version of ActiveState’s Active Tcl Community Edition, until we get a chance to do our own build of Tcl 8.6.X from source for future releases. ActiveState is a primary contributor to http://www.python.org and a respected and trusted source for python and tcl/tk related binaries on both Windows and Mac OS X.

See: http://www.activestate.com/activetcl/downloads
Version: 8.6.4.1 or later 8.6.X release


Signed Source Archives and Git Tags

Starting with Sigil v0.9.9, the Git tags and source archives used for Sigil releases are signed with Doug Massay’s PGP Key. His public key can be found and retrieved from any public key server. The fingerprint for his public key is: B5A5 6206 AB0F BC1A 24EF AB8A A166 D29A 8FCD AC63

Some Additional things

When you fire up Sigil for the very first time:

  • navigate to the new General Preferences and select the default
    epub version you plan to work with (epub 2 or epub3) so that new
    empty ebooks start with the correct code.
  • if you plan to work with epub3 epubs, you should change your
    PreserveEntities setting to use ONLY NUMERIC entities.
    For example use   for non-breaking spaces and etc.
  • We strongly recommend enabling Mend On Open in your settings
    for best performance with Sigil.