At the end of May 2025, the release of the open-source e-book editor Sigil 2.5.1 was announced, designed for working with ePub 2 and ePub 3 formats. The update includes bug fixes and performance improvements.
G. Ostrov
At the end of May 2025, the release of the free open-source cross-platform e-book editor Sigil 2.5.1 took place. The program uses Qt6 and QtWebEngine and is designed for editing books in ePub format (both ePub 2 and ePub 3).
Key Features of Sigil
Sigil is a professional tool for creating and editing electronic books. The source code is written in C++ and Python and published on GitHub under the GNU General Public License v3.0. The stable version Sigil 2.4.0 was released in January 2025, and version 2.5.0 was released in early May.
Supported Platforms
Sigil builds are available for major operating systems:
- Windows: Windows 10 (1809) and newer
- macOS: macOS 11 Big Sur and newer
- Linux: including Flatpak support
What's New in Version 2.5.1
In Sigil version 2.5.1, previously found errors and bugs have been fixed, and program performance has been improved. Main changes include:
- Added AppImage .desktop file with version information
- Removed AppImage bins element where possible
- Updated documentation, including Sigil Plugin Framework version 15
- Fixed previously added functions
Advantages of Using Sigil
Sigil is one of the most popular free editors for creating electronic books in ePub format. The program provides powerful tools for text formatting, adding images, creating table of contents and metadata. Thanks to the open source code, the program is continuously developed by a community of developers.
Official Sigil website: https://sigil-ebook.com
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