Fixed Layout vs Reflowable EPUB: Which Format Does Your Book Need?
Fixed‑layout EPUB keeps your design exactly as you created it. Reflowable adjusts to screen size. Learn which format fits novels, children’s books, cookbooks, workbooks, and visual titles.
By Magnus | Published 2026-04-16 | Category: Guide
Reflowable EPUB lets readers adjust font size and adapts to any screen — ideal for
novels and text-heavy books. Fixed-layout EPUB locks each page to its exact design —
essential for cookbooks, children's books, planners, and any book where the layout is
part of the content. Most designed books from Canva, InDesign, or Affinity Publisher need
fixed-layout EPUB. Choosing the wrong format means either a broken reading experience
(reflowable for a...
What Is Reflowable EPUB?
A reflowable EPUB treats the book's content as a continuous stream of text and images
that adapts to its container. Think of it like a webpage — the layout changes depending on
screen width, and users can resize text, change fonts, and adjust line spacing to their
personal preferences.
On a large tablet in landscape mode, a reflowable novel might show two lines per screen.
On a small e-ink Kindle with the font set to large, the same book might show three words
per line. The reading experience adjusts — and that is the entire point. The reader is in
control, not the publisher.
Reflowable EPUB is the dominant format for Kindle and most eBook platforms. It is what
most people mean when they say "eBook." The format is straightforward to produce for
text-based books, is widely supported across all devices and reading apps, and requires
no special tooling beyond standard word processor exports.
How Reflowable EPUB Handles Images
Images in a reflowable EPUB are treated as inline elements within the text flow.
They can be set to a percentage of screen width, but they do not have fixed positions.
An image that appears to the right of a paragraph on a wide screen may appear above or
below that paragraph on a narrow screen. For illustrations that accompany text, this
usually works acceptably. For images that are part of a designed layout — interlocked with
text in columns,...
What Is Fixed-Layout EPUB?
A fixed-layout EPUB locks each page to a specific pixel dimension. Every element —
text block, image, shape, and decorative element — is positioned at exact coordinates
that do not change regardless of the device or screen size. The page is rendered as
designed, and the reader views it by zooming and panning if their screen is smaller than
the page.
Fixed-layout was introduced in the EPUB 3 specification as a formal response to the need
for designed book types that could not be represented adequately in reflowable format.
It is now supported by all major eBook platforms — Amazon KDP, Apple Books, and Kobo —
and is the required format for designed books that need to maintain their visual integrity
across digital devices.
How Fixed-Layout Handles Different Screen Sizes
When a reader opens a fixed-layout EPUB on a screen smaller than the page dimensions,
the reading app scales the page down to fit the screen width. The reader can pinch to
zoom for detail. On a larger screen, the page may be displayed with margins on the sides.
The layout does not reflow — it scales.
This means fixed-layout books are best experienced on tablets and larger screens. A
children's book with full-page illustrations reads beautifully on an iPad. On a small
e-ink Kindle, the scaled-down text may be too small to read comfortably without zooming.
This is a genuine trade-off, and it is worth considering your primary audience's reading
device when choosing between formats.
The Key Differences — Comparison Table
Which Book Types Need Fixed Layout?
The clearest test: if you would be unhappy for the reader to resize the text or rearrange
the layout, you need fixed-layout EPUB. Here is a more specific breakdown by book type.
Children's Picture Books
Children's picture books are the canonical fixed-layout use case. Illustrations fill the
page, text is overlaid or positioned alongside art in specific ways, and the visual
relationship between text and image is fundamental to the story. A reflowable conversion
would separate text from illustrations, collapse layouts, and produce something unreadable.
If you designed your children's book in Canva and exported a PDF, a fixed-layout EPUB
conversion is the only appropriate path to digital publication. See our guide on
converting Canva PDFs to Kindle for
the full step-by-step process.
Cookbooks and Recipe Books
Cookbook layouts typically feature ingredient lists in one column, instructions in another,
and photos positioned to show the finished dish alongside its preparation steps. This
multi-column, image-integrated layout is the product — not decoration. Reflowable
conversion destroys it completely. Fixed-layout preserves it exactly.
Workbooks and Activity Books
Workbooks contain fillable areas, exercises positioned on the page, checklists, and
instructional graphics that reference specific page positions. The spatial layout of these
elements is part of how the book is used. A reflowable version would produce a nonsensical
reading order and destroy the functional relationship between elements.
Planners and Journals
Digital planners sold as eBooks need to maintain their grid structures, dated pages, and
template layouts. These are entirely position-dependent and require fixed-layout EPUB to
function correctly.
Coffee Table Books and Art Books
Photography books, art catalogues, and visual essay collections use full-page images,
carefully designed spreads, and text as a secondary element to visuals. The editorial
design choices in these books are deliberate and meaningful. They require fixed-layout
to survive the transition to digital.
Comic Books and Graphic Novels
Panel layouts, speech bubbles, and reading sequences in comics are defined by spatial
arrangement. A single page may contain panels of different sizes, arranged in a specific
reading order that depends on their position. Fixed-layout is the only format that
preserves this structure.
Illustrated Non-Fiction and Educational Books
Science books, history books, and educational titles that use diagrams, annotated
illustrations, sidebars, and infographic elements need fixed-layout to maintain the
relationship between text and supporting visuals. If a diagram has labels pointing to
specific parts of an image, a reflowable conversion will almost certainly misplace those
labels.
Which Book Types Work Best with Reflowable?
Reflowable EPUB is the right choice when the text is the primary value of the book and
the layout is secondary. Readers of these book types actively want control over typography
— large font sizes for older readers, specific fonts for dyslexia, or tight line spacing
for fast readers.
Novels and Short Story Collections
Fiction has no layout to preserve. Chapter headings, body text, and scene breaks are all
the structure a novel needs, and reflowable format handles all of these perfectly. Readers
who prefer large text or specific fonts benefit from the flexibility.
Memoirs and Personal Narratives
Similarly, memoir is text-led content. Even if the print edition uses decorative chapter
openers or author photographs, these elements do not require fixed-layout — they can be
included as inline images in a reflowable EPUB.
Standard Business and Self-Help Books
Most business books, self-help titles, and general non-fiction use straightforward chapter
structure with headers and occasional pull quotes. Unless the book uses heavy information
graphics or designed sidebars, reflowable works well.
Academic and Professional Reference Works
Academic books with equations, footnotes, and tables can be challenging in either format.
Reflowable is generally preferred because screen readers and academic accessibility tools
are better designed for it. Fixed-layout is sometimes used for mathematics-heavy content
where equation layout cannot be represented in EPUB's native MathML support.
Why This Matters for Amazon KDP, Apple Books, and Kobo
Each major platform has its own requirements and behaviour for fixed-layout versus
reflowable EPUBs. Understanding these differences helps you prepare your file correctly
before submission.
Amazon KDP
KDP is the most technically demanding platform for fixed-layout books. It requires a
valid EPUB 3 file with the correct fixed-layout declarations in the package document.
KDP's automated review system runs EPUBCheck validation and additional proprietary quality
checks. For reflowable books, KDP also accepts DOCX, HTML, and MOBI formats in addition
to EPUB. Fixed-layout books must be submitted as EPUB.
KDP's Kindle Previewer tool is essential for verifying your fixed-layout EPUB before
submission. It shows rendering across different Kindle device profiles — Fire tablets,
Kindle e-readers, Kindle for iOS and Android. If your fixed-layout book looks incorrect
in Previewer, it will look incorrect on those devices. Common
KDP rejection reasons for
fixed-layout books include missing viewport declarations, incorrect page dimension
me...
Apple Books
Apple Books (distributed via Apple's Books Store) has excellent native support for both
EPUB formats. Fixed-layout books on iPad display beautifully at full resolution, and Apple
has optimised the reading experience specifically for visual books. Apple's validation tool
(Books Producer) runs checks similar to EPUBCheck and provides detailed error reporting.
If you are publishing a children's book or illustrated guide, the Apple Books audience on
iPad is particularly valuable — the larger screen suits fixed-layout content well.
Kobo
Kobo supports both EPUB formats and is generally less strict than KDP in its submission
validation. However, Kobo's e-ink devices have smaller screens than tablets, which means
fixed-layout books that are designed for landscape viewing may not display optimally on
Kobo's e-readers. If Kobo is a primary sales channel, consider whether your fixed-layout
design works at the portrait dimensions of a Kobo device screen.
How MJ Convert Systems Creates Fixed-Layout EPUBs from Your PDF
If you have decided that your book needs fixed-layout EPUB, the next question is how to
produce one. The short answer: you need a tool built specifically for this purpose.
Most general-purpose converters — including Calibre — do not support fixed-layout EPUB
output. InDesign can export fixed-layout EPUB natively, but only for books that were
created in InDesign. For books designed in Canva, Affinity Publisher, Figma, or any other
tool that outputs a PDF, you need a PDF-to-fixed-layout-EPUB converter.
MJ Convert Systems was built for exactly this workflow. The process:
- Upload your PDF — exported at print quality from your design tool
- Automated audit — checks fonts, image resolution, page dimensions,
and structural compatibility before conversion begins
- Fixed-layout conversion — each page is converted to a properly
structured EPUB 3 fixed-layout content document, preserving positions with 99.7%
accuracy and image placement with 99.5% accuracy
- Visual validation — each output page is compared to the source
PDF page; export is gated until the validation passes
- Export — you download a KDP-ready, Apple Books–ready, Kobo-ready
fixed-layout EPUB
Plans start at $17.97/month (Lite), with Pro at $47.97/month and Max at $197/month for
high-volume publishing. All plans include a 7-day free trial
with no credit card required.
For a deeper look at how this compares to using Calibre or other tools, read our
Calibre vs MJ Convert Systems comparison
. If you work in InDesign or Affinity Publisher specifically, see our guide on
converting InDesign and Affinity Publisher files to EPUB
.
- Calibre vs MJ Convert Systems comparison
- How to convert Canva PDFs to Kindle
- See pricing and plans starting from $17.97/month
- See more guides on converting PDFs to Kindle
Frequently Asked Questions
- Can readers change the font size in a fixed-layout EPUB?
- No. Fixed-layout EPUBs lock the page at a specific size and do not respond to the reader’s font size or font family preferences.
- Does Amazon KDP support both fixed-layout and reflowable EPUB?
- Yes. KDP supports both formats. Reflowable EPUB is the default for most Kindle eBooks. Fixed-layout EPUB is supported for designed books.
- Is fixed-layout EPUB the same as a PDF?
- No. A fixed-layout EPUB and a PDF both lock content to specific page dimensions, but they are different formats entirely. Fixed-layout EPUB is a structured web-based format built on HTML, CSS, and XML.
- Can a single EPUB file contain both fixed and reflowable sections?
- Technically possible in the EPUB 3 specification, but most publishing tools and platforms work better with consistent formatting throughout the book.
- Does Kindle Unlimited pay royalties for fixed-layout books?
- Fixed-layout Kindle eBooks can be enrolled in Kindle Unlimited, but the royalty calculation may differ from reflowable titles. Check KDP’s current terms.
- What tools can create fixed-layout EPUB from a PDF?
- Very few general-purpose tools support fixed-layout EPUB output. InDesign can export it natively. For PDFs from other sources, MJ Convert Systems is designed specifically for this conversion.
See more guides on converting PDFs to Kindle
MJ Convert Systems PDF to EPUB converter
See pricing and plans starting from $17.97/month
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