How well does Calibre convert DOCX to EPUB?

Well for basic prose. Paragraph styles, bold/italic, lists, and images come through cleanly. Complex tables, text boxes, tracked changes, comments, and footnotes often don't — clean up the DOCX first by accepting all changes and removing comments.

What formatting should I use in Word for the cleanest EPUB conversion?

Use built-in Heading styles (Heading 1, Heading 2) for chapters and sections. Use paragraph styles, not manual spaces, for indents. Avoid text boxes, floating images, and multiple columns. Simple formatting converts; clever Word tricks don't.

Does converting DOCX to EPUB preserve images?

Yes. Calibre and Pandoc both extract inline images from the DOCX and embed them in the EPUB. Floating images (text-wrapping) are converted to inline images, which changes their position in the flow.

What should I do after converting DOCX to EPUB?

Run the validator, fix any errors, then open the metadata editor to add title, author, description, and cover image. Preview in a reader before distributing — conversion artifacts (odd spacing, broken headers) are common and easy to miss without a preview.

How to Convert DOCX to EPUB

Edit EPUB Metadata →

Converting Word to EPUB is the easy part — Calibre or Pandoc will do it in one click or one command. The hard part, the part nobody warns you about, is everything around the conversion: preparing the DOCX so the conversion doesn't fight you, and cleaning up the output so it passes KDP or Apple Books review.

Why the conversion alone isn't enough

A Word-to-EPUB converter takes your DOCX and maps Word styles to EPUB structure. What comes out is technically a valid EPUB but often has: wrong or missing metadata (the Word doc's author field isn't a real EPUB author), an auto-generated cover that's not your actual cover, a flat table of contents if you didn't use heading styles, and validation warnings that KDP may choke on. None of this shows up in Word. All of it shows up in Kindle Previewer.

Prepare the DOCX first

Five things to fix in the Word file before you convert:

Use heading styles, not bold text. "Chapter 1" styled as Heading 1. Scene breaks should be a styled *** divider, not a blank line. Converters build the TOC from heading styles; bold text with a larger font is invisible to them.
Use real page breaks between chapters. Ctrl+Enter (Insert → Page Break), not a stack of empty paragraphs. Empty paragraphs become extra blank lines in the EPUB.
Strip manual formatting. Select all → clear formatting → re-apply styles. Word accumulates direct formatting over years of editing; converters translate every bit of it into inline CSS, which bloats the file and makes the output brittle.
Consistent smart quotes. File → Options → Proofing → AutoCorrect → Smart quotes. Mixed straight/curly quotes look unprofessional and one of the easier things to fix.
Replace manual indentation with first-line-indent styles. Don't use tabs or spaces to indent paragraphs — set first-line indent on the Normal style. Word lets you get away with tabs; EPUB doesn't render them consistently.

Pick a converter

Calibre — GUI, recommended for most

Download from calibre-ebook.com. Drag your DOCX into the library → Convert books → output format EPUB → set the cover, title, author, description in the Metadata pane → click OK. Honors heading styles, handles images, builds a TOC.

Gotchas: the default font size is tiny — set it to 16pt under Look & Feel if readers complain. Calibre sometimes inlines a large amount of CSS; run the output through the compressor to strip it.

Pandoc — command line, cleanest output

pandoc book.docx -o book.epub --toc --epub-cover-image=cover.jpg --metadata title="My Book" --metadata author="Jane Doe" --metadata lang="en-US"

Pandoc strips Word's direct formatting more aggressively than Calibre, producing cleaner EPUBs. It doesn't auto-generate a cover — pass --epub-cover-image. Use --toc-depth=2 to control TOC depth. Free, cross-platform, scriptable.

Reedsy Studio — online, no install

Paste your manuscript into reedsy.com/studio, adjust styles in the editor, click Export → EPUB. Free. Good for one-off conversions when you don't want to install anything. Less control over the final output than Calibre or Pandoc.

Post-conversion cleanup

The part most authors skip. After conversion, run the EPUB through these three steps:

Validate: upload to the EPUB validator with deep scan. Fix any errors. Warnings can usually be ignored but read them first.
Fix metadata: open the metadata editor. Set the real title, author, language, publisher, and description. Converters often leave fields blank or copy the file name.
Compress: run the compressor. Cuts image weight, strips bloat, re-zips. Usually halves the file size without quality loss.

That's the difference between an EPUB that just opens and an EPUB a store will accept without a rejection cycle.

What DOCX has that EPUB doesn't

Complex tables. Multi-column tables with merged cells usually flatten. Simple 2-column tables convert fine.
Footnotes as pop-ups. EPUB 3 supports these via epub:type="footnote", but converters usually render footnotes as end-of-chapter links. Fix manually if it matters.
Tracked changes. Accept all changes in Word first. Converters don't handle tracked changes cleanly.
Embedded Excel or charts. These get rasterized or dropped. Export as images first and insert them as pictures.

Validate EPUB — catch errors before upload
Edit EPUB metadata — fix title, author, language
Compress EPUB — reduce file size
Self-publishing guide — the full pipeline
Upload to KDP — what Amazon expects

Try it now — free

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