Convert DOCX to EPUB online for free. Fast, private, no signup, no watermark — high-quality DOCX-to-EPUB conversion in your browser.
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Checking files and selected output formats.
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EPUB is the open ebook standard — reflows text, supports tables of contents and metadata, works on every e-reader except Kindle (which uses MOBI/AZW3 natively but converts EPUB on upload). Convert to EPUB when publishing to Apple Books, Kobo, Google Play Books, or shipping direct-to-reader PDFs / DOCX manuscripts.
Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.
| Property | DOCX | EPUB |
|---|---|---|
| Full name | Microsoft Word (Open XML) | Electronic Publication |
| Year introduced | 2007 | 2007 |
| Developer / standard body | Microsoft | W3C (formerly IDPF) |
| MIME type | application/vnd.openxmlformats-officedocument.wordprocessingml.document | application/epub+zip |
| File extension | .docx | .epub |
| Compression | ZIP-compressed XML | ZIP-compressed XHTML + CSS |
| Color / data depth | N/A (text) | N/A |
| Max dimensions / size | 32 MB recommended | Software-limited |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | ECMA-376 / ISO/IEC 29500 | W3C EPUB 3.3 / ISO/IEC 23736 |
| Best for | Modern Word documents, collaborative editing | Apple Books, Kobo, Nook, Google Play Books — reflowable text |
DOCX (Office Open XML Document) is Microsoft's default Word document format, introduced with Office 2007. It replaced the older binary DOC format with an XML-based, ZIP-compressed architecture. This modern structure makes DOCX files smaller, more resilient to corruption, and easier for third-party software to read and write.
DOCX is fully editable across Microsoft Word, Google Docs, and LibreOffice, making it the most widely compatible editable document format. It supports rich formatting including styles, tables, images, headers and footers, track changes, and comments. DOCX is the standard choice for documents that need to be collaboratively edited or revised, from business reports to academic manuscripts.
Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert DOCX files to EPUB.
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