It is common for a book to start life as a paperback, particularly for authors who thought primarily in terms of print, or for a heavily designed non-fiction title where a Kindle edition was set aside as "too complicated" at first. Coming back to add a Kindle edition later is usually worthwhile, but the right technical approach genuinely depends on what is inside the book, not just on wanting "an ebook too".
This guide sets out the difference between reflowable and fixed-layout Kindle formats, when each is the right choice, and what accessibility means in practice for a book with more than plain running text.
Reflowable versus fixed-layout ebooks
A reflowable ebook lets the text resize and rewrap according to the reader’s chosen font size, screen and device, which is what most Kindle readers expect and prefer for straightforward reading. It suits novels, memoir, and non-fiction that is primarily running text with occasional simple headings.
A fixed-layout ebook preserves an exact page design, similar to a PDF, which is necessary when a book depends on a specific visual arrangement: diagrams next to specific paragraphs, complex tables, illustrated children’s books, or workbooks with fill-in spaces. The trade-off is that fixed-layout pages do not resize for the reader in the same way, and small text can be harder to read on smaller screens.
| Aspect | Reflowable | Fixed-layout |
|---|---|---|
| Text resizing for reader | Yes, adjusts to reader preference | Limited or none |
| Suits | Novels, memoir, text-heavy non-fiction | Illustrated books, workbooks, complex diagrams and tables |
| Production effort | Generally more straightforward | Generally more time-consuming and technical |
| Screen reader and accessibility support | Usually more straightforward to support well | Needs deliberate extra work to support well |
Deciding which format fits your book
The decision usually comes down to whether the book’s content depends on a fixed visual arrangement to make sense. If diagrams, tables, sidebars or illustrations are placed deliberately next to specific text and would lose meaning if rearranged, fixed-layout is generally the right choice, even though it takes more work. If the book is essentially continuous prose with occasional simple formatting, reflowable is usually both easier to produce and a better reading experience.
Example
Imagine a business book with several process diagrams that need to sit directly beside the paragraph explaining them. Converting this straight to reflowable text without adjustment risks the diagrams ending up disconnected from their explanation once the text resizes; a fixed-layout approach, or a carefully adapted reflowable layout with images treated deliberately, avoids that problem.
Accessibility considerations
Accessibility, meaning how usable the book is for readers using screen readers or other assistive technology, matters for any ebook, but it requires more deliberate attention in fixed-layout books, since text embedded as part of an image is not readable by a screen reader unless it is also tagged with accompanying text. Reflowable ebooks with properly structured headings and genuine, selectable text tend to be more straightforward to make accessible.
At the time of writing, KDP provides accessibility guidance covering topics such as image alt text, reading order and navigation, and it is worth checking this directly, since requirements and recommended practices can be updated. Treating accessibility as an afterthought, particularly in a fixed-layout book with diagrams or illustrations, tends to produce a poorer result for a meaningful group of readers.
Converting an existing paperback file
A print-ready file, typically laid out for a fixed page size with specific pagination, is not the same file structure an ebook needs, even before deciding between reflowable and fixed-layout. Headers, page numbers, running heads and print-specific page breaks generally need to be removed or adjusted, and a straightforward text-to-ebook conversion tool or service is usually more reliable than trying to repurpose a print PDF directly.
- 1
Decide reflowable or fixed-layout
Based on how much the book depends on a fixed visual arrangement, as above.
- 2
Prepare a dedicated ebook source file
Remove print-specific elements such as running heads and page numbers; retain genuine chapter structure and headings.
- 3
Check image and diagram treatment
Ensure images are appropriately sized and, where meaningful, have alt text describing their content.
- 4
Preview on an actual device or emulator
Check how the file displays before publishing, rather than relying on the conversion tool’s preview alone.
What not to assume
Do
- Match the ebook format, reflowable or fixed-layout, to what the book’s content actually needs.
- Check current KDP formatting and accessibility guidance before finalising the file.
- Preview the finished ebook on an actual device before publishing.
Avoid
- Assume a print-ready PDF can be uploaded directly as a good-quality Kindle ebook.
- Choose fixed-layout by default when the content would work well and more accessibly as reflowable text.
- Treat accessibility as optional, particularly for a book relying on images or diagrams.
Kindle conversion worksheet
Private worksheet
Kindle conversion worksheet
A private way to plan converting a paperback into a well-made Kindle edition. Nothing here is scored or sent.
Your answers stay in this browser tab only. Nothing is scored, sent or saved to an account.
Common mistakes
- Uploading a print PDF directly as the Kindle file. Print-specific pagination, headers and page numbers usually make for a poor reading experience if carried over unchanged.
- Choosing fixed-layout when reflowable would work better. Fixed-layout is more work and less flexible for the reader; it is worth reserving for books that genuinely need it.
- Ignoring accessibility for images and diagrams. Text embedded only in an image is not accessible to a screen reader unless properly described.
- Not previewing on an actual device. A file that looks fine in a conversion tool’s preview can still display poorly on a real Kindle app or device.
- Assuming every reader wants Kindle. Some print-focused genres and audiences may see limited digital demand; it is still usually worth offering the option.
Frequently asked questions
Can I just upload my paperback PDF as the Kindle version?
It is not recommended. Print-specific formatting, such as page numbers and running heads, generally needs to be removed or adjusted for a good ebook reading experience.
How do I know if I need fixed-layout instead of reflowable?
If the book depends on a specific visual arrangement of diagrams, tables or illustrations to make sense, fixed-layout is usually the better fit; straightforward prose usually works better as reflowable text.
Is fixed-layout harder to make accessible?
Generally yes. Text embedded in images needs deliberate alt text and structure to be usable with a screen reader, which takes more care than a well-structured reflowable file.
Does Kindle have specific accessibility requirements?
At the time of writing, KDP provides accessibility guidance on topics such as alt text and reading order; check current documentation directly, since guidance can be updated.
Will adding a Kindle edition definitely increase sales?
It widens the pool of potential buyers to readers who prefer or only use digital formats, but it does not address discoverability or conversion issues on its own.