EPUB vs PDF for Ebooks — Which Format Should You Publish In?

This debate has been going on for over a decade, and people still get it wrong. The answer isn't "EPUB is better" or "PDF is better." It depends entirely on what you're publishing and where your readers will consume it.

Let me cut through the noise.

The Fundamental Difference

EPUB is reflowable. Text reflows to fit the screen. A 6-inch Kindle, a 10-inch iPad, a phone in portrait mode — the text adjusts. Readers can change font size, font family, line spacing, and margins. The content adapts to the reader. PDF is fixed layout. What you designed is what they see. Every page looks identical regardless of device. Fonts, spacing, images — all locked in place. The reader zooms and scrolls to read on smaller screens.

That single distinction drives every other difference.

Reading Experience by Device

Device	EPUB	PDF
6" e-reader (Kindle, Kobo)	Excellent	Terrible (constant zooming)
10" tablet	Excellent	Good (readable without zooming)
Phone	Good (text reflows)	Nearly unusable
Desktop/laptop	Good	Excellent
Print	N/A	Designed for it

If your audience reads on phones and e-readers — and statistically, most ebook readers do — EPUB wins by a mile. Nobody wants to pinch-zoom every page of a 300-page novel.

When EPUB Wins

Fiction and narrative nonfiction. Novels, memoirs, biographies, essays. Anything that's primarily flowing text with the occasional image. EPUB handles this perfectly. Self-publishing to major stores. Amazon KDP, Apple Books, Google Play Books, Kobo, Barnes & Noble Press — they all accept EPUB (or their own variant of it). Some accept PDF, but it renders as fixed-layout, which readers hate on small screens. Accessibility. EPUB 3 supports screen readers, text-to-speech, and dyslexia-friendly font overrides. PDF accessibility exists but is harder to implement and less consistently supported by readers. File size. A typical 80,000-word novel in EPUB: about 300-500 KB. The same book as PDF: 2-5 MB depending on fonts and formatting. Not a huge deal with modern storage, but it adds up in a large library.

When PDF Wins

Anything with precise visual layout. Textbooks with complex diagrams, art books, photography books, scientific papers with equations and figures, graphic novels, comics, children's picture books.

If moving an image 3 pixels to the right matters to you, PDF is the only option. EPUB's reflowable nature means you surrender control over exact positioning.

Print distribution. If you're producing a physical book, your printer needs a PDF. IngramSpark, Amazon KDP Print, BookBaby — they all take print-ready PDFs. EPUB is irrelevant for physical copies. Academic and technical papers. LaTeX produces beautiful PDFs with precise equation rendering. Converting that to EPUB is possible but usually degrades the formatting. Most academic readers expect PDF and have workflows built around it. Internal documents and reports. Nobody distributes a corporate annual report in EPUB. PDF preserves your brand formatting and looks professional when printed.

The Self-Publishing Decision Matrix

If you're self-publishing, here's the straightforward answer:

• Writing a novel or narrative nonfiction? EPUB. Convert to PDF only if you also want a print edition.
• Writing a textbook or technical book? Both. EPUB for the ebook stores, PDF for the print edition and direct sales.
• Writing a cookbook with full-page photos? PDF for print, fixed-layout EPUB for ebook stores.
• Writing a comic or graphic novel? PDF for quality, CBZ for comic readers, fixed-layout EPUB for stores.

The "Just Publish Both" Approach

Most authors should produce both formats. Write in a structured format (Markdown, DOCX, or InDesign), then export to EPUB for digital distribution and PDF for print.

The conversion is straightforward. Tools like MyPDF's EPUB to PDF converter handle the basic conversion, though for a polished print edition you'll want to design the PDF separately.

Going the other direction — PDF to EPUB — works for simple text-heavy documents but struggles with complex layouts. If your PDF has multi-column text, sidebars, and wrapped images, expect to spend time fixing the EPUB output.

A Note on Fixed-Layout EPUB

EPUB 3 supports fixed-layout pages that behave like PDF — exact positioning, no reflow. Apple Books and Kobo support it well. Amazon converts it to their KF8 format.

This gives you the visual precision of PDF with the distribution reach of EPUB. The downside: readers can't adjust font size, and it looks bad on small screens. Same tradeoffs as PDF.

Use fixed-layout EPUB for children's books, cookbooks, and graphic-heavy content where the major ebook stores are your primary channel.

Bottom Line

For text: EPUB. For visuals: PDF. For maximum reach: both. That's really all there is to it.

Related Tools

• EPUB to PDF — Convert ebooks to PDF for printing
• PDF to EPUB — Make PDFs readable on e-readers
• Word to PDF — Create print-ready PDFs from manuscripts
• Compress PDF — Reduce PDF file size for digital distribution