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Word EPUB Swap

Word to EPUB

Your file never leaves this device. Conversion runs in your browser. The document itself is not uploaded.

1 · Choose a Word file

…or drop a Word file here

.docx · stays in this tab

2 · Convert

3 · Download

Choose a file to convert. It is not uploaded.

FAQ and format details
Why convert Word to EPUB?

Authors still draft in Word. EPUB is what stores and most non-Kindle devices want. Doing it here avoids Word's 'Save as Web Page' plus a separate packager, and it never uploads the manuscript.

How this conversion runs

Mammoth maps Heading 1–6 to h1–h6. If the HTML has two or more h1s, each starts a chapter XHTML file; otherwise you get one chapter. Images that Mammoth inlined as data URLs can travel into the EPUB. nav.xhtml is generated from those chapter titles.

Keep in mind for Word → EPUB

Word users often apply Heading 1 once (the title) and Heading 2 for chapters — then you get a one-chapter book. Restyle chapter titles as Heading 1 in Word first, or fix the HTML. Headers, footers, and footnotes are weak. Kindle store files are still a Calibre step away.

After you have a EPUB file

Open the EPUB and check the TOC. If chapters are wrong, fix styles in Word and reconvert. Add a cover in Sigil. For Amazon, convert EPUB→Kindle in Calibre, not on this page.

My chapters are all Heading 2. What now?

In Word, select those headings and apply Heading 1, or convert DOCX→HTML and change h2 chapter titles to h1 before HTML→EPUB.

Will my Word cover image become the EPUB cover?

Not as EPUB cover metadata. A picture in the body may appear on page one. Set the cover properly in Sigil or Calibre for store distribution.

This pair at a glance
Accepts
.docx
Writes
.epub · application/epub+zip
Read fidelity
high (Word → HTML)
Write fidelity
high (HTML → EPUB)
Source size
Plan for files under 24 MB

The file is read in this tab. It is not uploaded.

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About Microsoft Word (Office Open XML) and EPUB

Source file

Microsoft Word (Office Open XML)

The default Word format since 2007: a ZIP package of XML parts for body text, styles, media, and document settings.

DOCX (Office Open XML WordprocessingML) replaced the binary .doc format. It is the interchange format for business documents: resumes, contracts, manuscripts. Word, Google Docs, LibreOffice, Pages, and OnlyOffice all read and write it. Macros live in a sibling .docm type, which this converter does not execute or emit.

Extensions
.docx
MIME types
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Kind
zip · binary
Category
word processing
Standard
Open format · since 2006
Comfortable size
Up to about 24 MB in this browser converter
Read into HTML
high fidelity · implemented — Decoded with Mammoth into semantic HTML (h1–h6, p, tables, images as data URLs).

What this format can hold

  • headings
  • paragraphs
  • lists
  • tables
  • links
  • images
  • inline formatting
  • headers footers
  • styles
  • comments
  • track changes

Usually dropped on the way in

  • macros
  • track changes
  • comments
  • embedded objects
  • complex text boxes
  • headers footers

Apps that consume Word

  • Microsoft Word (Microsoft) — creates and opens on Windows, macOS, Web, iOS, Android
  • Google Docs (Google) — creates and opens on Web, iOS, Android
  • LibreOffice Writer (The Document Foundation) — creates and opens on Windows, macOS, Linux
  • Apple Pages (Apple) — creates and opens on macOS, iOS
  • OnlyOffice — creates and opens on Windows, macOS, Linux, Web
  • WPS Office (Kingsoft) — creates and opens on Windows, macOS, Linux, Android

Catalog notes

  • .docm, .dotx, and .dotm are not accepted; strip macros before converting.
  • ZIP sniffing is shared with ODT and EPUB — the engine also checks [Content_Types].xml for WordprocessingML.

Destination file

EPUB

The open ebook format: a ZIP of XHTML chapters, CSS, and a package manifest. What Apple Books, Google Play Books, and most non-Kindle readers consume.

EPUB 3 is HTML in a spine. That makes the HTML hub almost native: we concatenate or split XHTML documents and rewrite the OPF package. Kindle’s AZW/MOBI family is a different type and is not in this matrix.

Extensions
.epub
MIME types
application/epub+zip
Kind
zip · binary
Category
ebook
Standard
Open format · since 2007
Comfortable size
Up to about 38 MB in this browser converter
Written from HTML
high fidelity · implemented — Emits EPUB 3 with a single content document split on h1, plus nav.xhtml.

What this format can hold

  • headings
  • paragraphs
  • lists
  • links
  • images
  • inline formatting
  • chapters
  • table of contents

Usually dropped on the way out

  • multi file chapter map unless h1 split

Apps that consume EPUB

  • Apple Books (Apple) — opens on macOS, iOS
  • Google Play Books (Google) — opens on Web, Android, iOS
  • Calibre — creates and opens on Windows, macOS, Linux
  • Thorium Reader — opens on Windows, macOS, Linux
  • Foliate — opens on Linux
  • Kindle (via conversion) (Amazon) — opens on e-ink, iOS, Android
  • Sigil — creates on Windows, macOS, Linux

Catalog notes

  • DRM-encumbered EPUBs are rejected.
  • Kindle AZW3/MOBI is a later type, not an alias of EPUB.
Other conversions

Other conversions from Word: HTMLMarkdownRTFOpenDocumentPDF

Other ways to get EPUB: HTMLMarkdownRTFOpenDocumentPDF