EPUB vs. Print-Ready PDF: Which Export Format Does Your Book Need?
Proselis TeamPosted on August 1, 2026When your manuscript is finished, "export the book" turns out to be two very different jobs. E-book stores want an EPUB. Print-on-demand services want a PDF with exact page dimensions. Understanding what each format actually is saves you from the most common publishing-day surprises.
EPUB: text that reflows
An EPUB is closer to a small website than to a document. The text has no fixed pages — the reader's device decides how many words fit on a screen, and the reader can change the font, the size, and the margins at will.
That's the point. A well-made EPUB:
- reflows cleanly at any font size, so there are no "pages" to break
- carries a navigable table of contents generated from your chapter structure
- keeps styling semantic (headings, emphasis, block quotes) rather than visual (this exact font at this exact position)
The practical consequence: stop fighting for pixel control in an EPUB. Decisions like widows, orphans, and page balance simply don't exist there. What matters is clean structure — every chapter marked as a chapter, every heading a real heading.
Print-ready PDF: pages that never move
A print-ready PDF is the opposite contract. Every line is frozen in place, and the printer reproduces exactly what you send. That means the file must carry decisions an EPUB never faces:
- Trim size — the physical page dimensions (6"×9" is a common trade size)
- Margins and gutter — the inner margin must absorb the binding
- Recto/verso conventions — chapters traditionally open on a right-hand page
- Widow and orphan control — a single line stranded at the top of a page is the classic amateur tell
- Embedded fonts — the printer has your PDF, not your font library
Side by side
| Question | EPUB | Print-ready PDF |
|---|---|---|
| Layout | Reflowable, device-controlled | Fixed, author-controlled |
| Fonts | Reader can override | Embedded, final |
| Page numbers | None (locations instead) | Real, with running heads |
| Used by | Kindle, Apple Books, Kobo | KDP Print, IngramSpark, offset printers |
| Typical failure | Broken navigation, forced styling | Wrong trim size, missing gutter |
Which one do you need?
Follow the route your book is taking:
- E-book stores only — you need an EPUB. (Amazon converts your EPUB on upload; you don't make a Kindle-specific file anymore.)
- Print-on-demand only — you need a print-ready PDF at the exact trim size your printer lists, plus a separate cover file built from their template.
- Both — you need both files, and they should come from the same source manuscript so a late edit doesn't fork the two editions.
That last clause is where tooling matters. If your EPUB and your PDF are produced by two separate manual processes, every correction after the first export has to be made twice — and eventually one edition drifts. Proselis generates both from the same chapters: the EPUB from the book's structure, and the print PDF through a real pagination engine that handles trim size, gutters, and chapter openings.
The one-sentence version
EPUB is your book as structure, PDF is your book as pages — ship the structure to e-book stores, ship the pages to printers, and make sure both come from one manuscript.