No. 6 of 28 ·eBook Creation Software

Sigil

Windows · Mac · Linux

Freedom report

Three barsScore 6.5

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Sigil is ranked #6 of 28 in eBook creation software on Freedom251. 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: Yes
EPUB export: Yes
Ebook validation: Yes
Import formats: EPUB, HTML, images, stylesheets

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The record

Purpose: Sigil is an EPUB editor designed to help users create and format ebooks.
Audience: The project describes Sigil as suitable for personal ebook formatting and professional editors publishing on multiple platforms.
License: Sigil is free and open source under GPLv3.
EPUB support: Sigil supports EPUB 2 and EPUB 3 specifications.
Editing features: It offers Code View and Preview View, direct EPUB syntax editing, and a table of contents generator with multi-level heading support.
Import and cleanup: Sigil supports importing EPUB and HTML files, images, and style sheets, and can mend or prettify imported files.
Search and spelling: Sigil includes spell checking with configurable dictionaries and regular expression support for Find & Replace.
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.
Operating systems: The download page lists Windows x64 and macOS Intel and Arm64 downloads, and offers a Linux AppImage.
Version requirements: The Windows installer requires Windows 10 version 1809 or newer, and current Sigil requires macOS 13 or newer.
Download integrity: Release files have automatically generated SHA-256 checksums available on the GitHub releases page.
Release signing: Since Sigil v0.9.9, Git tags and source archives used for releases are signed with Doug Massay’s PGP key.
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.
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.
Price from: Free

Where it ranks on Freedom251

Best eBook Creation Software in 2026#6 of 28

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Sources

sigil-ebook.com/sigil/· checked 3 Oct 2026
sigil-ebook.com/sigil/plugins/· checked 3 Oct 2026
sigil-ebook.com/sigil/download/· checked 3 Oct 2026
sigil-ebook.com/sigil/source/· checked 3 Oct 2026
sigil-ebook.com/sigil/support/· checked 3 Oct 2026
sigil-ebook.com/sigil/tips/· checked 3 Oct 2026
sigil-ebook.com· checked 28 Sept 2026