EPUB vs DOCX: which format should you upload?
Two file formats cover almost every self-publishing workflow: DOCX (what you write in) and EPUB (what readers read). Knowing the difference saves you from the most common formatting headaches.
What EPUB is
EPUB is the standard reflowable ebook format. The text adapts to any screen size and reader font setting, which is exactly what you want for a novel or most non-fiction. It's what stores and e-readers expect, and it's what Ebokio serves to readers.
What DOCX is good for
DOCX is a writing format, not a reading format — but it's perfectly fine as an upload. If you write in Word or Google Docs, you don't need to learn EPUB tooling: upload the DOCX and let the platform convert it. Ebokio generates a clean, reader-ready EPUB from your DOCX automatically.
Which should you upload?
Upload whichever you already have. If your book is mostly text, DOCX converts beautifully. If you've hand-crafted an EPUB with specific styling, upload that to preserve your choices. Either way, focus on clean heading structure — that's what determines whether your table of contents and chapters come out right.
- Writing in Word/Docs → upload DOCX
- Already have a polished EPUB → upload EPUB
- Avoid PDF for ebooks — it doesn't reflow on small screens