How to Create an EPUB File

Q: How to Create an EPUB File?

Learn how to create EPUB ebook files from scratch, from Word documents, or from HTML. Covers Sigil, Calibre, Pandoc, and online tools.

Creating your own EPUB ebook file is easier than you think. Whether you're self-publishing a novel, converting a document, or packaging a report, here are the best methods in 2026.

Method 1: From a Word Document (Easiest)

If you've already written your book in Microsoft Word or Google Docs, converting to EPUB is straightforward.

Using Calibre

Save your document as .docx
Open Calibre, click "Add books," select your DOCX file
Click "Convert books," choose EPUB as the output format
Set metadata (title, author, cover), click OK
Right-click the book → "Save to disk" to get the EPUB file

Using Pandoc (Command Line)

For developers: pandoc input.docx -o output.epub --epub-cover-image=cover.jpg. Fast, scriptable, and excellent for batch processing.

Method 2: From HTML/Markdown

If you write in Markdown or HTML, Pandoc is the best tool:

pandoc chapter1.md chapter2.md chapter3.md -o book.epub \
  --metadata title="My Book" \
  --metadata author="Your Name" \
  --epub-cover-image=cover.jpg \
  --toc

This creates a properly structured EPUB 3 file with a table of contents and cover image.

Method 3: Using Sigil (Full EPUB Editor)

Sigil is a free, open-source EPUB editor that lets you create EPUBs from scratch with full control over the HTML, CSS, and book structure.

Download and install Sigil
Create a new EPUB (File → New)
Add chapters as XHTML files
Write or paste your content
Add images, fonts, and CSS styling
Edit the table of contents
Save as EPUB

Sigil is best for authors who want pixel-perfect control over formatting.

Method 4: Online Tools

Several online tools let you create basic EPUBs without any software. For existing EPUBs, Epublys lets you edit metadata, merge files, and compress the result.

After Creating Your EPUB

Validate your EPUB — check for errors before publishing
Edit metadata — make sure the title, author, and description are correct
Add a cover image — essential for online stores and libraries
Compress the EPUB — optimize file size for distribution
Send to Kindle — test how it looks on Kindle

EPUB Structure Basics

An EPUB is a ZIP file containing XHTML content, CSS styles, images, and an OPF manifest. Understanding this helps when troubleshooting formatting issues. Learn more in our What is an EPUB file? guide.

Related Guides

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Edit EPUB metadata online. Change title, author, description, language, publisher. Free ebook metadata editor - no software needed.

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