Sigil is a free and open-source ebook editor that allows you to create and edit EPUB files directly, without the need for complex markup. It provides a WYSIWYG (What You See Is What You Get) interface alongside a code editor, making it accessible for both novice and experienced ebook creators. This tool is invaluable for authors and publishers who want fine-grained control over their ebook formatting, allowing for precise adjustments to layout, metadata, and content that automated conversion tools often miss. It excels at producing clean, standards-compliant EPUBs.
Editorial check
How this page is checked
Source trail
sigil-ebook.com
External links are separated from Surfaced commentary.
Reader safety
Context before clicks
Product links and external services are not presented as guarantees.
Monetization
No affiliate flag
Ads and commerce links are kept distinct from editorial text.
Surfaced take
Why It’s Useful
Sigil empowers creators to take full control of their ebook's presentation. Unlike conversion tools that can mangle formatting, Sigil lets you directly manipulate the HTML, CSS, and XML that make up an EPUB. This means you can ensure your book looks exactly as you intend across various e-readers and devices, fixing layout issues, embedding fonts, and adding custom styling with confidence. Its robust feature set, including chapter splitting, metadata editing, and spell-checking, streamlines the ebook production process. Many independent authors and small publishers rely on Sigil to produce professional-quality ebooks efficiently, saving on potentially expensive design services.
In everyday life
When you’d actually reach for this
When you've finished writing your novel and want to self-publish, you'll reach for Sigil to format it into a clean EPUB file. You can then upload this professional-looking ebook to platforms like Amazon Kindle Direct Publishing or Apple Books, ensuring your readers have a seamless experience.
Enjoyed this? Get five picks like this every morning.
Free daily newsletter — zero spam, unsubscribe anytime.