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Sigil 2.8.1

Multi-platform EPUB ebook editor

filecart Linux Updated Oct 13, 2026
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Sigil 2.8.1 screenshot
Sigil 2.8.1 screenshot

About Sigil

Sigil was designed to make it easy to create great ebooks using the EPUB format.
If you are formatting books for your own use, or you are a professional editor publishing books on multiple platforms, then Sigil is for you.
You can use Sigil to format and package your books into an EPUB that looks exactly the way you want it to using an advanced set of features
that have made Sigil one of most popular EPUB editors available.

This open-source and completely free software is written and supported entirely by volunteers.
The current Sigil development team includes Doug Massay and Kevin Hendricks as co-lead developers and maintainers.
Previous developers/authors include John Schember, Grant Drake and Dave Heiland.
Sigil was originally created by Strahinja Markovic in 2009 and remains completely free to download and use.
Support is also provided by other volunteers who contribute code, translations and helpful answers to user’s questions.
See the Help=>About menu in Sigil for a complete list of contributors.

Some Sigil features:

• Free and open source software under GPLv3

• Multi-platform: runs on Windows, Mac, and Linux

• Full UTF-16 support

• EPUB 2 and EPUB 3 spec support

• Multiple Views: Code View and Preview 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

• Themeable icons

• 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

• All imported files can have their formatting mended, and your code can be optionally “prettified”

• Plugin Support

• Checkpoint support (compare “snapshots” of changes)

• Pies and Puppies!

License: GPL-3.0+
Release info Update on Jul 18, 2026
Release notes Sigil 2.8.1 is a bugfix release.

Bug Fixes
• fix multiple bugs in AddExisting that could sometimes add duplicate image entries and skip some xhtml imports
• fix bug that caused altimage urls on math tags to not be properly updated when moved or renamed
• prevent crash in python function replace when re can not handle an expression that PCRE2 recognizes
• fix bug when using OpenWith to re-open BBEdit.app on MacOS if BBEdit was already open
• make launching PageEdit on MacOS via the Preferred XEditor always spawn a new copy of the PageApp
• fix bugs when newlines were sometimes added to css files that threw off sync to Style.
• fix bug that prevented Mend and Prettify from working in CV after a resource name change
• fix bug in TOCHTMLWriter that dropped a needed newline causing Preview to be misaligned. Thank you BeckyEbook!
• add workarounds to macOS Tahoe bugs that prevent modal native dialogs from working
• fix bug in Create an HTML TOC that did not drop the busy cursor during requests for import

Notes:

The Sigil Linux AppImage is built on Ubuntu Jammy (22.04) and is targeting glibc 2.35 and higher. Use ldd --version to see if your system at least has a shot at being able to use the AppImage. Don't forget to make sure the AppImage is executable after downloading. Trouble is not expected but be safe and backup your existing Sigil preferences (if you have any) before trying the AppImage.

The latest version of the Sigil User Guide can always be downloaded from the Sigil website, or from its own GitHub repository.

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

The MacOS builds are signed AND notarized.

PGP Fingerprint (for signed tags and source archives): B5A5 6206 AB0F BC1A 24EF AB8A A166 D29A 8FCD AC63
Listing dataFlathub

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