Formatting for Kindle Direct Publishing: Ebook and Print Interiors

Formatting for Kindle Direct Publishing means preparing two different interiors: a flexible ebook that adapts to the reader's device and a fixed print file built for a chosen trim size. Use paragraph styles and logical structure for the ebook; use exact page geometry, margins, bleed, and an exported PDF for the paperback or hardcover.

This page covers manuscript interiors only. Use Kindle Ebook Cover Size for the front cover, Amazon Book Cover Dimensions for format dimensions, and KDP publishing guidelines for broader rules and compliance.

Choose the Interior Type Before Formatting

KDP's current Book Formatting hub separates ebook, paperback, and hardcover resources because the reading systems are different.

Reflowable ebook

Most novels and text-led nonfiction should use reflowable formatting. Readers can change font, text size, line spacing, margins, and device orientation. Your job is to provide structure, not lock every line in place.

Fixed-layout or print-replica ebook

Use a fixed approach only when page composition is essential, such as some comics, children's books, or image-heavy textbooks. Fixed layouts require more testing and can reduce accessibility or device compatibility. Follow KDP's format-specific documentation rather than treating a PDF as a universal ebook.

Print interior

A paperback or hardcover is a sequence of fixed pages. You control trim, margins, page breaks, running heads, folios, and image placement. Once exported, the PDF should not reflow.

Prepare the Manuscript Before Conversion

Formatting cannot compensate for inconsistent source material. Work from a clean copy of the final manuscript.

Use paragraph styles

Create styles for body text, title, chapter heading, section heading, block quotation, lists, captions, and other repeated elements. Do not format paragraphs with repeated spaces, tabs, or manual line breaks.

Styles make the book consistent and make revisions safer. If a chapter-heading style changes, every chapter can update together.

Remove hidden problems

Before importing or converting:

• Replace tabs and repeated spaces used for indents.
• Remove extra paragraph marks used for vertical spacing.
• Check smart quotes, apostrophes, dashes, and ellipses.
• Use real page breaks before chapters in the print version.
• Confirm scene-break markers are consistent.
• Resolve comments, tracked changes, and hidden text.
• Check image captions and alt text.
• Run a final spelling and consistency pass.

Keep an untouched backup before cleanup.

Format a Reflowable Kindle Ebook

KDP's ebook manuscript formatting guide links the supported manuscript formats, navigation requirements, image guidance, Kindle Create, and Kindle Previewer.

Keep body text flexible

Avoid forcing a print design into the ebook. Do not set the body in a fixed point size, justify layout with spaces, or add headers and page numbers. Kindle readers create their own pages.

Use semantic headings and normal paragraphs. Set first-line indents through styles, and remove the indent from the first paragraph after a chapter heading if that is your design convention.

Build working navigation

Create a logical table of contents linked to chapter or section headings. Test every entry after conversion. Also check the book's start location so readers open at the intended first reading page rather than a blank page or long block of front matter.

Handle images deliberately

Insert images at a useful source resolution without forcing page-width dimensions that break smaller screens. Compress them enough to avoid unnecessary file size while preserving text and meaningful detail. Add descriptive alt text when the image conveys information.

Do not embed important text in an image unless the format requires it. Image text cannot adapt like normal ebook text and may be difficult for assistive technology.

Keep front and back matter concise

Typical front matter may include title, copyright, dedication, and a short contents list. Move long acknowledgments, author biography, newsletter invitation, and other promotional material to the back where appropriate. Readers should reach the book quickly.

Preview on several devices

Use Kindle Previewer and inspect phone, tablet, and e-reader views. Change font size and orientation. Check:

• Chapter starts.
• Indents and spacing.
• Table of contents links.
• Lists and block quotes.
• Images and captions.
• Footnotes or endnotes.
• Scene breaks.
• Very large and very small reader font settings.

An ebook that looks correct in the source word processor can still convert badly.

Format a Paperback or Hardcover Interior

Print formatting begins with production choices. KDP's Print Options page lists available ink, paper, trim, and page-count combinations.

Select trim, ink, paper, and bleed

Choose the format before setting page geometry. KDP identifies 6 × 9 inches as its common US trim and classifies trim larger than 6.12 inches wide or 9 inches tall as large for printing-cost purposes.

Decide whether any interior image or color reaches the page edge. If so, use a bleed setup supported by KDP. A book with no edge-to-edge interior content can use no bleed.

These choices affect page count, print cost, and later cover dimensions. The physical trim-size owner is Amazon KDP book sizes.

Set margins and gutter from the current table

The inside margin protects text from the binding. KDP's minimum margin depends on page count, and bleed changes the required outside dimensions. Use the current KDP margin table for the final page count instead of copying settings from another book.

Margins are minimum safety values, not an automatic design. A readable novel often needs more breathing room than the technical minimum. Test the result in a proof held like a real book.

Build print typography

Choose a readable body typeface, line length, and leading. Use paragraph styles and avoid widows, orphans, isolated headings, and distracting word spacing.

Common print controls include:

• New chapters beginning on a recto page when the design calls for it.
• Running heads omitted from title, copyright, and chapter-opening pages.
• Page numbers placed consistently.
• Scene breaks that remain visible at page boundaries.
• Hyphenation and justification reviewed by eye.
• Front matter using the intended numbering system.

Place images at final size

Check effective resolution after cropping and scaling. Images intended to print sharply should normally provide about 300 pixels per inch at placed size. Line art may need a different treatment. Make sure captions, credits, and permissions are complete.

Export a stable print PDF

Export the full interior at the exact page dimensions. Embed fonts. Keep image quality appropriate for print, and do not add crop marks unless KDP asks for them. Open the exported PDF and review it independently of the layout program.

Confirm:

• Page size and total page count.
• Fonts embedded correctly.
• No comments, form fields, or unexpected layers.
• No blank pages created by export settings.
• Images and transparency render correctly.
• Bleed pages extend as required.

Use KDP's Preview Tools

Upload the ebook and print interiors separately. Review every automated warning instead of accepting it by habit.

For the print preview:

• Scan every page thumbnail for unexpected shifts.
• Inspect pages with images, tables, and unusual formatting.
• Check gutter and outside margins.
• Confirm bleed warnings against the design.
• Verify blank pages are intentional.
• Confirm the last page and total page count.

For the ebook, use Kindle Previewer as well as KDP's online preview. Test navigation and reader settings again after the final conversion.

Interior Formatting Checklist

Ebook

• Reflowable or fixed layout chosen for the content.
• Paragraph styles used consistently.
• No print headers, footers, or page numbers.
• Linked table of contents works.
• Images resize and include appropriate alt text.
• Scene breaks and chapter starts remain clear.
• Several device sizes and reader settings tested.

Print

• Format, trim, ink, paper, and bleed finalized.
• Margins meet the current page-count requirements.
• Body type, running heads, and folios are consistent.
• Images have enough effective resolution.
• Fonts are embedded in the exported PDF.
• PDF page size and page count are correct.
• Print Previewer warnings are resolved.
• A physical proof has been checked before wide distribution.

Interior formatting is successful when readers stop noticing it. Keep the ebook flexible, make the print file exact, and verify the exported files rather than trusting the source document.