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Tech riderRev. 3 Oct 2026

Sigil

Ch 087.1of 28 eBook Creation Software
  1. 1Runs onLinux, Mac, Windows
  2. 2CostsFree plan
  3. 3EPUB exportYes
  4. 4Ebook validationYes
  5. 5Import formatsEPUB, HTML, images, stylesheets
5 lines stated Written from the maker's own pages: sigil-ebook.com
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The Sigil homepage

Overview

Sigil is ranked #8 of 28 in eBook creation software on Specifiction. It runs on Linux, macOS, Windows. There is a free plan.

Sigil plans and pricing

All plans
Sigil Free Completely free to download and use · Windows, macOS, Linux sigil-ebook.com · 3 Oct 2026

Compared on eBook creation software

Free plan
Yessigil-ebook.com
EPUB export
Yessigil-ebook.com
Ebook validation
Yessigil-ebook.com
Import formats
EPUB, HTML, images, stylesheetssigil-ebook.com

Facts

Purpose
Sigil is an EPUB editor designed to help users create and format ebooks.sigil-ebook.com · 3 Oct 2026
Audience
The project describes Sigil as suitable for personal ebook formatting and professional editors publishing on multiple platforms.sigil-ebook.com · 3 Oct 2026
License
Sigil is free and open source under GPLv3.sigil-ebook.com · 3 Oct 2026
EPUB support
Sigil supports EPUB 2 and EPUB 3 specifications.sigil-ebook.com · 3 Oct 2026
Editing features
It offers Code View and Preview View, direct EPUB syntax editing, and a table of contents generator with multi-level heading support.sigil-ebook.com · 3 Oct 2026
Import and cleanup
Sigil supports importing EPUB and HTML files, images, and style sheets, and can mend or prettify imported files.sigil-ebook.com · 3 Oct 2026
Search and spelling
Sigil includes spell checking with configurable dictionaries and regular expression support for Find & Replace.sigil-ebook.com · 3 Oct 2026
Plugins
Sigil supports third-party plugins, which may be open source or proprietary and are not vetted by Sigil developers unless a developer authored them.sigil-ebook.com · 3 Oct 2026
Operating systems
The download page lists Windows x64 and macOS Intel and Arm64 downloads, and offers a Linux AppImage.sigil-ebook.com · 3 Oct 2026
Version requirements
The Windows installer requires Windows 10 version 1809 or newer, and current Sigil requires macOS 13 or newer.sigil-ebook.com · 3 Oct 2026
Download integrity
Release files have automatically generated SHA-256 checksums available on the GitHub releases page.sigil-ebook.com · 3 Oct 2026
Release signing
Since Sigil v0.9.9, Git tags and source archives used for releases are signed with Doug Massay’s PGP key.sigil-ebook.com · 3 Oct 2026
Support
The official user support forum is on MobileRead, and the developers say direct support emails will almost always go unanswered because this is a volunteer community project.sigil-ebook.com · 3 Oct 2026
WYSIWYG editing
Sigil’s former Book View WYSIWYG editor was removed; the separate PageEdit application can be launched through Sigil’s Open With feature or external editor button.sigil-ebook.com · 3 Oct 2026

Company

Founded
2009sigil-ebook.com · 28 Sept 2026

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Where it ranks on Specifiction

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Sources