Word to EPUB formatting errors are one of the top reasons KDP uploads fail or look broken on Kindle. Word is a word processor — not a structured ebook engine.
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Why Word breaks EPUB
- Hidden styles and direct formatting fight each other
- Images anchored oddly reflow into gaps or overlaps
- Footnotes / endnotes convert inconsistently
- Manual tabs and spaces fake layout that EPUB cannot preserve
- “Save as Web Page / filtered HTML” pipelines produce messy markup
Quick fixes if you must stay in Word
- Use Styles for Heading 1/2 and Normal — never fake headings with bold+size
- Remove manual page breaks used as decoration
- Compress images; prefer inline consistent sizes
- Accept Track Changes and remove comments before export
The reliable fix: stop using Word as your ebook builder
Import the DOCX into Manusly, let the editor rebuild structure for EPUB3/Kindle, preview on device frames, then export. Authors searching word to epub formatting errors usually need a dedicated formatter more than another Word macro.
See also: KDP formatting guide.
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