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Sigil

Multi-platform EPUB ebook editor

E-books & Media Library ★ 7k stars Easy setup GPL-3.0

Sigil is a free, open-source EPUB editor for creating and editing electronic books in the EPUB format. It offers a WYSIWYG interface alongside direct code editing, validation, and metadata management.

Official siteSource code

Key features

  • WYSIWYG and code editing
  • EPUB 2 and EPUB 3 support
  • Built-in validation
  • Metadata editor

Strengths

  • Released under the GPL-3.0 license
  • Easy to set up — beginner-friendly
  • Mature project with 7k GitHub stars
  • Written in C++

Is Sigil secure?

No known vulnerabilities affect Sigil's latest release (2.8.1). OSV.dev lists 1 past advisory for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2019-14452, published 2019-07-31 (2632 days ago), fixed in 0.9.16

Source: OSV.dev, checked 2026-10-14. How this is measured.

Sigil replaces

Self-hosted Adobe InDesign EPUB export alternatives

Health badge

Maintain Sigil? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 93 · excellent

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[![SelfHostIndex health score for Sigil](https://selfhostindex.com/badge/sigil.svg)](https://selfhostindex.com/app/sigil/)
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<a href="https://selfhostindex.com/app/sigil/"><img src="https://selfhostindex.com/badge/sigil.svg" alt="SelfHostIndex health score for Sigil"></a>
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.. image:: https://selfhostindex.com/badge/sigil.svg
   :alt: SelfHostIndex health score for Sigil
   :target: https://selfhostindex.com/app/sigil/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

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