Sigil
Sigil is a free, open source, multi-platform ebook editor that uses Qt (and QtWebEngine). It is designed to edit books in ePub format (both ePub 2 and ePub 3).
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// frequently asked questions
Open PowerShell or Command Prompt and run: winget install Sigil-Ebook.Sigil. Winget is built into Windows 10 (1809+) and Windows 11.
Sigil is a free, open source, multi-platform ebook editor that uses Qt (and QtWebEngine). It is designed to edit books in ePub format (both ePub 2 and ePub 3).
Sigil is available under the GNU General Public License v3.0 license. Use winget or the direct download link on this page.
Run winget upgrade Sigil-Ebook.Sigil in PowerShell or Windows Terminal to update Sigil to the latest version.
Run winget uninstall Sigil-Ebook.Sigil in an elevated PowerShell window, or go to Settings > Apps > Installed Apps.