Free Web-based Sigil Alternatives

Sigil is not available as a web app but there are plenty of alternatives that runs in the browser with similar functionality. The best free Online alternative is GitBook. If that doesn't suit you, our users have ranked more than 25 alternatives to Sigil and 11 are free and available as a web app so hopefully you can find a suitable replacement. Other interesting free Online alternatives to Sigil are Notaku, ePubEditor, ManuscriptHQ and NextBook.

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Get a badge for your siteSigil alternatives page was last updated Aug 5, 2026

GitBook
61 likes
GitBook is a tool for building beautiful books using Git and Markdown. It can generate your book into multiple formats:
102 GitBook alternatives
Cost / License
Freemium
Proprietary (Apache-2.0)
Application typeApplication types
Documentation Generator
Team Collaboration
Origin
United States
Platforms
Online
United States
Good alternative?Is GitBook a good alternative to Sigil?
Notaku
6 likes
Turn you Notion into documentation, knowledge base and blog websites.
75 Notaku alternatives
Cost / License
Freemium
Proprietary
Platforms
Online
+1
Good alternative?Is Notaku a good alternative to Sigil?
ePubEditor
Like
ePUB Editor is an online environment for the simple and immediate creation of ebooks in EPUB3 format.
Cost / License
Freemium
Proprietary
Origin
Italy
EU
Platforms
Online
Italy
EU
+4
Good alternative?Is ePubEditor a good alternative to Sigil?
ManuscriptHQ
Like
A step-by-step self-publishing workspace to write, organize, format, and get your book publishing-ready — without the overwhelm.
Cost / License
Freemium
Proprietary
Origin
United States
Platforms
Online
Software as a Service (SaaS)
United States
+2
Good alternative?Is ManuscriptHQ a good alternative to Sigil?
NextBook
4 likes
NextBook is quick and easy way to buid technical books or documentation that support modern standards and run blazingly fast. It's built with MDX and Next.js and works by compiling markdown or MDX down to plain static html.
Cost / License
Free
Open Source (MIT)
Application typeApplication types
Documentation Generator
Static Site Generator
Platforms
Mac
Windows
Linux
Online
Good alternative?Is NextBook a good alternative to Sigil?
Novelist Freeware
2 likes
Novelist Freeware is a free in browser book writing application that helps you write your book in a simple and efficient way. It is designed to be easy to use, with a clean and intuitive interface that allows you to focus on your writing.
Cost / License
Free
Proprietary
Application type
Novel Authoring
Origin
Romania
EU
Platforms
Online
Romania
EU
+5
Good alternative?Is Novelist Freeware a good alternative to Sigil?
To EPUB
2 likes
Instantly convert text documents and ebooks to EPUB format with this free online EPUB converter.
Cost / License
Free
Proprietary
Platforms
Online
Good alternative?Is To EPUB a good alternative to Sigil?
Folio Studio
Like
Folio Studio is a web-based book layout tool for independent authors and self-publishers. Start from scratch with a blank book structure, or import an existing manuscript in Markdown, DOCX, ODT or PDF, then export a professionally formatted book ready for ebook stores or print...
Cost / License
Freemium
Proprietary
Origin
France
EU
Platforms
Online
Software as a Service (SaaS)
France
EU
+9
Good alternative?Is Folio Studio a good alternative to Sigil?
Comic2ePub
Like
Comic2ePub is a cloud-based tool that converts comic and manga PDFs into ready-to-publish EPUB and ePDF files — no coding required.
Cost / License
Freemium
Proprietary
Origin
Germany
EU
Platforms
Online
Software as a Service (SaaS)
Germany
EU
+1
Good alternative?Is Comic2ePub a good alternative to Sigil?
Koberger
Like
Browser-based formatter for indie authors managing a catalogue. Imports Word, Pages, and Google Docs manuscripts; reuses copyright, bio, and also-by pages; applies series-wide designs; creates box sets; previews ebooks and print pages; and exports EPUB, print PDF.
Cost / License
Freemium
Proprietary
Application type
Ebook Editor
Origin
United Kingdom
Platforms
Online
Software as a Service (SaaS)
United Kingdom
+3
Good alternative?Is Koberger a good alternative to Sigil?
Scripturabilis
Like
Online ePUB editor, export to ePUB, PDF or Word.
Cost / License
Freemium
Proprietary
Platforms
Online
Software as a Service (SaaS)
+1
Good alternative?Is Scripturabilis a good alternative to Sigil?