Sigil – Multi-platform EPUB e-book Editor

Sigil is an easy to use, open source, multi-platform WYSIWYG e-book editor. It’s designed to edit books in ePub format.

Sigil provides an advanced editing environment for EPUB books. The main user interface (UI) is built around a tabbed central editing view-space and a Book Browser to the left. You double-click files in the Book Browser with your mouse, and an editing (or display) tab is added to the main pane. These tabs can then be closed, reordered or opened again.

Sigil presents a file-focused editing environment. You can open every XHTML file and edit it in a WYSIWYG manner in the Book View, or edit the code directly in the Code View. You can edit the CSS, XPGT and other files, and view the images one by one.

Features include:

  • Sports an intuitive graphical user interface.
  • WYSIWYG editing in book view.
  • Full EPUB 2 specification support.
  • Full UTF-16 support.
  • Multiple Views: Book View, Code View and Split View.
  • Metadata editor with full support for all possible metadata entries (more than 200) with full descriptions for each.
  • Table of contents editor.
  • Table of contents generator with multi-level heading support.
  • Book View fully supports the display of any XHTML document possible under the OPS spec.
  • SVG support.
  • Basic XPGT support.
  • Full regular expression (PCRE) support for find and replace.
  • Advanced automatic conversion of all imported documents to Unicode.
  • Supports import of EPUB and HTML files, images, and style sheets.
  • Embedded HTML Tidy.
  • Integrated API to external HTML and graphics editors
  • Full Unicode support: everything you see in Sigil is in UTF-16.
  • PyQt5 support for plugins.
  • Cross-platform support.

Support: User Manual, GitHub, Forum
Developer: Kevin Hendricks, Doug Massay and many contributors (original author Strahinja Val Marković)
License: GNU GPL v3


Sigil is written in C++ and C. Learn C++ with our recommended free books and free tutorials. Learn C with our recommended free books and free tutorials.

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