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Jutoh vs Sigil: catalog facts
Jutoh	Sigil
Paid One-time purchase with no subscription; a demo is available to try first.	Free Free and open source under the GPL.
Windows, macOS, Linux	Windows, macOS, Linux
Imports Word, ODT, EPUB and text files Exports Kindle, EPUB, HTML, Markdown, CBZ and audio	Edits EPUB 2 and EPUB 3 in a visual view or directly in the XHTML Built-in validation catches the errors that make readers reject a book
Paid after the demo Print output goes through ODT rather than direct PDF	EPUB only; it does not handle MOBI, AZW3 or PDF Some XHTML and CSS knowledge is needed to fix anything non-trivial
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.