DOCX (Microsoft Word Open XML Document) and EPUB (Electronic Publication) are built for different jobs. DOCX is typically used for editing documents, resumes, while EPUB is best for e-readers, phones, tablets. Converting lets you open, share or upload your files wherever EPUB is expected.
How to use the DOCX to EPUB converter
- Add your DOCX filesClick “Choose Files” or drag and drop them into the box. You can add many files at once — or paste a file with Ctrl+V.
- Choose EPUB and adjust settingsEPUB is selected automatically. Optionally open Settings to change output options.
- Convert and downloadPress “Convert”. Your EPUB files appear instantly — download them one by one or all together as a ZIP.
DOCX vs EPUB
DOCX Microsoft Word Open XML Document
DOCX is the default Microsoft Word format. It is fully editable and supported by Word, Google Docs, LibreOffice and Pages, but layout can shift between programs.
- Compression
- ZIP-compressed XML
- Features
- Editable text, styles, images
- Origin
- 2007, Microsoft
- Best for
- Editing documents, resumes
EPUB Electronic Publication
EPUB is the open e-book standard. Text reflows to fit any screen and it is supported by Apple Books, Kobo, Google Play Books and — since 2022 — Kindle via Send to Kindle.
- Compression
- ZIP-compressed XHTML
- Features
- Reflowable text
- Origin
- 2007, IDPF/W3C
- Best for
- E-readers, phones, tablets
Why use ConvertMathly?
Files are processed on your device and never uploaded. Close the tab and they are gone.
No account, no daily cap, no queue and no watermark — convert as much as you want.
No waiting for uploads or downloads: results are ready as fast as your device can process them.
Windows, Mac, Linux, Chromebook, iPhone and Android — any modern browser, nothing to install.
Frequently asked questions
How do I convert DOCX to EPUB?
Add your DOCX files above, make sure EPUB is selected and press Convert. The EPUB files are ready to download a few seconds later — no installation or account required.
Is there a file size or daily limit?
No. Since everything runs locally, there are no daily caps, queues or file size limits beyond what your device can handle.
Are my DOCX files uploaded to a server?
No. ConvertMathly converts files entirely inside your web browser using JavaScript and WebAssembly. Your files never leave your computer or phone, which makes it safe for private photos and documents.
Can I convert multiple DOCX files at once?
Yes — add as many files as you like. They are converted one after another and you can download everything in a single ZIP.