How to Format an eBook for Kindle (KDP Manuscript Guide 2026)

KDP accepts DOCX, EPUB, and KPF (Kindle Create's native format) as of 2026. DOCX is the most common starting point and Amazon's converter handles it well if the source file is clean — but "clean" is doing a lot of work in that sentence. A DOCX exported from Google Docs after multiple rounds of copy-pasting from other documents typically carries invisible formatting cruft: leftover styles, manual spacing built from empty paragraphs instead of paragraph spacing settings, and inconsistent heading tags.

EPUB gives you more control if you're comfortable with the format, since you're defining the HTML/CSS structure directly rather than trusting a converter's interpretation of a DOCX. Kindle Create (Amazon's free formatting tool) is the middle path — it takes a DOCX or plain text file and walks you through applying a template, and it's the fastest route to a clean result if you don't want to touch HTML.

Manual page breaks using repeated Enter key presses is the single most common issue. On a fixed page, hitting Enter ten times to push a chapter to a new page looks fine. On Kindle, where a reader might have their font size cranked up to 200%, those ten blank paragraphs become ten blank screens they have to page through. Every chapter break needs an actual page-break command (Insert > Page Break in Word, not spacebar or Enter), not visual spacing.

First-line indents applied as manual tabs or spaces instead of paragraph style settings is the second-most common issue, and it's invisible in your editor but ugly on Kindle — you'll see a tab character rendered as inconsistent gaps, or indents that only apply to some paragraphs after a copy-paste. Set indentation once, in the paragraph style, and let it apply automatically.

Images dropped in at their original resolution without resizing will either balloon the file size past KDP's limits or render at a size that doesn't fit the screen. Resize images to a maximum width of about 1,600 pixels before inserting them, and always add alt text — screen readers and some Kindle accessibility features depend on it.

Font choices beyond the handful Kindle actually supports get silently swapped for a default serif font, which is fine, but decorative fonts used for chapter titles or pull quotes can render as garbled placeholder characters instead of falling back gracefully. Stick to standard fonts for anything structural and treat any decorative font choice as a nice-to-have that might not survive conversion.

Front matter — everything before Chapter 1 — follows a fairly fixed order in commercially published books, and readers notice when it's missing or out of order even if they can't name why. Title page first, then copyright page (required — this is where your copyright notice, ISBN if you have one, and edition information live), then an optional dedication, then table of contents, then an optional foreword or preface, then the book itself.

The table of contents needs to be a real, clickable navigation element (an NCX/HTML TOC), not a static list of page numbers you typed by hand — page numbers are meaningless in a reflowable format where the reader controls font size. Kindle Create and most modern DOCX-to-EPUB converters build this automatically from your heading styles, which is the real reason to use heading styles consistently instead of just bolding chapter titles manually.

Back matter is where most self-published non-fiction under-delivers. A closing call-to-action (asking for a review, linking to your next book or your email list), an author bio, and — if relevant — a bibliography or resource list all belong here. This is also free real estate for cross-promoting your other titles or your lead magnet funnel, and Amazon's "Also Bought" algorithm partly rewards books that keep readers moving to another purchase.

Before you upload, verify:

• Every chapter starts with an actual page break, not manual spacing
• Paragraph indents are set via paragraph style, not tabs or spaces
• Images are resized to a reasonable web resolution and have alt text
• The table of contents is built from heading styles and is clickable
• Front matter follows the standard order: title, copyright, dedication, TOC, book
• Back matter includes a CTA and author bio at minimum
• You've previewed the file in KDP's own previewer on at least a phone-size and tablet-size virtual device, not just your desktop screen

If you're drafting with an AI tool like getebook.ai, the chapter structure and heading hierarchy usually come out clean by default, since the tool is generating consistent chapter breaks rather than the ad hoc spacing a human might improvise while writing in a rush. That doesn't eliminate the formatting pass — you still need to check images, confirm the TOC links correctly, and build real front and back matter — but it removes the most common source of the page-break and indent problems described above.