Sigil-1.6.0 represents a mix of bug fixes and new features for both epub2 and epub3.

Windows x64 download
MacOS download

New Features:

  • Find and Replace search targets expanded to include tabbed files, CSS files, OPF and NCX files
  • Saved Searches now save full search Controls (mode, direction, options, and targets)
  • Preview loading is now completely asynchronous with a loading progress bar and loading placeholder
  • Merge will now automatically prevent duplicate ids
  • Merge will automatically add ids are former file boundaries to prevent TOC, Guide, and href losses
  • A new Xhtml Highlighter speeds up huge single file loading considerably
  • Redesigned CodeView Spellchecking to bring it back to Sigil-1.3.0 speeds
  • The External XHTML editor will now always pass along the OPF path and spine position to simplify interface with PageEdit (use “Open With” if you want the old behaviour)
  • Added PyQtWebEngine as a newly required python module for Plugins. ie. Plugins now have access to browser functionality for implementing e-Readers, more complex guis.

Bug Fixes:

  • Add Qt workaround for restoring Sigil window sizes when FindReplace left open on macOS
  • Add missing tr() calls to the tooltips in the Special Character selection dialog
  • Fix bug when all unused selectors are removed as in css stylesheet – adds a comment placeholder
  • Make empty Nav have a title to help empty epub passing epubcheck
  • Fix bug where fonts couldn’t be previewed when a space was in the path
  • Redesigned code to make Merging large numbers of files much faster (Thank you Text2002ans)
  • Fix bug in blank language field in Spellcheck Dialog (Thank you Text2002ans)
  • Fix use of different indentation of css via PR from BeckyEbook (Thank you)
  • Fix typos in plugin framework guide (Thank you Doitsu)
  • Fix hang on launch when opf manifested files exist inside the META_INF (Thank you un_pogaz)
  • Fix Metadata Editor bugs related to alternate-script (Thank you Carmina16) (#613)
  • Fix Metadata Editor bugs related to epub2 event dates (Thank you Octet-nl) (#616)


The Sigil user guide has been updated for Sigil-1.6.0+ for the new Saved Search Controls and Find & Replace targets. It can always be downloaded from its own repository.

Three new e-Reader plugins for Sigil have been built to help users see what their ebook might look like in real e-readers while still inside Sigil. See this post for descriptions and links.

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.

Mac users should also check out the wiki entry on the New Release File Format.

PGP Fingerprint: B5A5 6206 AB0F BC1A 24EF AB8A A166 D29A 8FCD AC63

All binary (and source) downloads can be found as assets at the bottom of The Sigil Github Release page.