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What is a reflowable ebook?

A reflowable ebook has no fixed pages. Its text rearranges itself to fit the screen and the type size the reader picks, so one file reads well on a phone, a tablet and an e-reader. KDP says its eBooks are reflowable by default.

What it means in practice

The reader sets the type size and the screen sets the line length, so you cannot control where a line or a page ends. A running head, a page number on a contents page, or two pictures placed side by side on a spread will not survive the way they do in print.

That suits text that reads straight through. It suits a coloring page or a worksheet badly, because those depend on the page itself. The alternative is a fixed layout.

How Chapbook uses it

Chapbook’s EPUB 3 is reflowable, with a navigable table of contents. The digital PDF of the same book keeps fixed pages, so you can offer each reader the one that suits their device, as PDF vs EPUB explains.

An activity pack has no EPUB at all, because a reflowable coloring page is no use to anyone. To see the difference, download both files of the sample on this page, then open the EPUB in a reading app and change the type size.

In a real book

Cover of The Pricing Playbook by Jane Founder: a brass balance scale lit from the left on deep teal above white type, subtitle “How founders set a price they can defend”.
Title page. Page 1 of The Pricing Playbook.
Copyright. Page 2 of The Pricing Playbook.
Contents. Page 3 of The Pricing Playbook.
Introduction. Page 4 of The Pricing Playbook.
Introduction. Page 5 of The Pricing Playbook.
Why Guessing Fails. Page 6 of The Pricing Playbook.
Why Guessing Fails. Page 7 of The Pricing Playbook.
Why Guessing Fails. Page 8 of The Pricing Playbook.
Why Guessing Fails. Page 9 of The Pricing Playbook.
What You Are Actually Selling. Page 10 of The Pricing Playbook.
What You Are Actually Selling. Page 11 of The Pricing Playbook.
What You Are Actually Selling. Page 12 of The Pricing Playbook.
What You Are Actually Selling. Page 13 of The Pricing Playbook.
Interview Ten Customers. Page 14 of The Pricing Playbook.
Interview Ten Customers. Page 15 of The Pricing Playbook.
Interview Ten Customers. Page 16 of The Pricing Playbook.
Interview Ten Customers. Page 17 of The Pricing Playbook.
Interview Ten Customers. Page 18 of The Pricing Playbook.
Choose the Value Metric. Page 19 of The Pricing Playbook.
Choose the Value Metric. Page 20 of The Pricing Playbook.
Choose the Value Metric. Page 21 of The Pricing Playbook.
Choose the Value Metric. Page 22 of The Pricing Playbook.
Draft Three Tiers. Page 23 of The Pricing Playbook.
Draft Three Tiers. Page 24 of The Pricing Playbook.
Draft Three Tiers. Page 25 of The Pricing Playbook.
Draft Three Tiers. Page 26 of The Pricing Playbook.
Set the Numbers. Page 27 of The Pricing Playbook.
Set the Numbers. Page 28 of The Pricing Playbook.
Set the Numbers. Page 29 of The Pricing Playbook.
Set the Numbers. Page 30 of The Pricing Playbook.
Say the Price Out Loud. Page 31 of The Pricing Playbook.
Say the Price Out Loud. Page 32 of The Pricing Playbook.
Say the Price Out Loud. Page 33 of The Pricing Playbook.
Say the Price Out Loud. Page 34 of The Pricing Playbook.
Revisit Every Quarter. Page 35 of The Pricing Playbook.
Revisit Every Quarter. Page 36 of The Pricing Playbook.
Revisit Every Quarter. Page 37 of The Pricing Playbook.
Revisit Every Quarter. Page 38 of The Pricing Playbook.
Conclusion. Page 39 of The Pricing Playbook.
Conclusion. Page 40 of The Pricing Playbook.
Appendix: The Interview Script. Page 41 of The Pricing Playbook.
Appendix: The Interview Script. Page 42 of The Pricing Playbook.
Back cover of The Pricing Playbook: the description over the cover's artwork.
Introduction 5 / 44
The Pricing Playbook, how founders set a price they can defend: a nonfiction book of 9,862 words and 43 pages on 6 × 9 in, generated from one brief and exported unedited. It is a sample, not a customer's book. Download the PDF (381 KB) or the EPUB (107 KB).

Sources

Last reviewed 30 October 2026

  1. Amazon KDP, “Creating Reflowable Books”
  2. W3C, “EPUB 3.3”, section “Layout” (W3C Recommendation, 13 January 2026)
  1. What is an EPUB? EPUB is the open file format for reflowable ebooks. What is inside one, how it differs from a PDF, and what Chapbook's EPUB 3 export includes.
  2. What is a fixed-layout ebook? A fixed-layout ebook keeps every page exactly as designed instead of reflowing. What it gives up, when it is worth it, and what Chapbook does instead.
  1. AI ebook writer for nonfiction: from one paragraph to EPUB An AI ebook writer for nonfiction: an outline you approve, chapters drafted in your voice from your own sources, then an EPUB 3, a typeset PDF, a Word file and a cover.

Questions people ask

Does a reflowable ebook have page numbers?

Not fixed ones. The number of screens depends on the device and the type size the reader chose, so a page in one reader's view is not a page in another's.

Is a Chapbook EPUB reflowable?

Yes, always. Chapbook does not make a fixed-layout EPUB. For pages that must stay exactly as typeset, use the PDF.

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