KDP Paperback Formatting Checklist: What to Check Before Upload

1. Lock the print specifications before formatting

Decide the book’s trim size, interior ink choice, paper option, bleed requirements, binding format, and approximate page count before finalising the interior and cover. These choices affect layout decisions. If you change trim size late, line breaks and page count may shift; that may then change the spine width and require a revised cover.

Make a one-page production brief with the title, subtitle, author name, trim size, page count estimate, black-and-white or colour interior, bleed or no bleed, paper choice, and intended marketplaces. Keep the same source of truth for the designer and formatter. A cover created for one page count may not fit a later manuscript without adjustment.

Use KDP’s official paperback manuscript formatting guide and its formatting resources to confirm requirements that apply to your specific project. Do not rely on a random template that was created for a different trim size or an older version of the platform.

2. Check the interior manuscript file

• Page size: Set the document to the selected trim size, not the default letter or A4 page unless that is your chosen trim size.
• Margins and gutter: Leave adequate inside margin for binding and follow the current requirements for your page count.
• Fonts: Use readable, properly embedded fonts where the export format requires them, and ensure font size and line spacing are consistent.
• Paragraph styles: Apply styles for chapter headings, body text, subheadings, block quotes, lists, and captions instead of manually styling each paragraph.
• Page breaks: Start chapters consistently, and avoid using repeated blank paragraphs to force content onto another page.
• Headers and footers: Check running heads, page numbers, and blank pages; remove inappropriate headers from title or part-opening pages where needed.
• Images: Confirm resolution, placement, bleed, contrast, caption accuracy, and permission to reproduce the image.
• Front and back matter: Review title page, copyright page, dedication, contents, acknowledgements, about the author, and any calls to action.

For novels and simple nonfiction, consistent typography and whitespace matter more than decorative flourishes. For workbooks, books with tables, poetry, or image-heavy content, inspect every page manually because automatic reflow can create layout issues that are not obvious from a few sample pages.

Lock trim size, page count and bleed before final layout

Print formatting should begin with production decisions, not with decorative styling. Confirm the trim size, paper and ink choices, whether the interior needs bleed, how the book will be bound, and the approximate final page count. Those choices affect margins, gutter, spine width and the overall cover template. Changing them late can mean rebuilding both the interior and cover.

Bleed matters when images, background colours or other elements are intended to run to the edge of the page. Without enough extension beyond the trim line, a thin white edge can appear after cutting. Books without bleed use different page dimensions. Do not copy measurements from a different book unless its format, page count and print specifications truly match your own.

Decide whether your book is primarily text, contains tables and footnotes, includes full-page illustrations, or uses complex typography. Some free conversion tools work well for simple text books but may not preserve complex design elements as intended. For illustrated or heavily formatted work, a controlled PDF workflow and detailed proof review may be more suitable.

3. Common formatting errors to catch

Do not solve layout issues by inserting dozens of manual spaces or line breaks. Use section breaks, page breaks, paragraph settings, and styles. The file should remain maintainable if a sentence or page changes.

Check front matter, chapter structure and back matter

Readers notice when a book begins abruptly, chapters are hard to navigate, or the last page feels unfinished. A print manuscript commonly needs a title page, copyright page and any relevant dedication, epigraph, foreword or introduction. Not every book needs every element. Add only what serves the reader and the publication’s conventions, and verify any legal or rights statements for your situation.

Related guide: Front matter and edition details should be settled before final export. Read our ISBN guide to understand the decisions that depend on format and publishing route.

Use built-in paragraph styles or a consistent style system rather than manually making every heading bold and larger. Consistent heading structure makes revisions easier and reduces the risk of uneven spacing. Check that every chapter starts where intended, page numbers appear consistently, headers do not leak onto chapter-opening pages if your design excludes them, and blank pages are intentional rather than accidental.

Back matter can help the reader continue their relationship with the author. Depending on the book, it may include acknowledgements, notes, bibliography, a discussion guide, a brief author biography, a list of other books or an invitation to visit the author’s website. Ensure that URLs are accurate, the call to action makes sense for the audience and no placeholder copy remains.

4. Confirm cover, metadata, and upload files

The full paperback cover is a single wraparound file, usually including back cover, spine, and front cover. Its exact dimensions depend on the selected trim size, page count, paper and bleed choices. The spine width changes when the final page count changes, so calculate it only after the interior is stable. Check barcode placement, safe zones, text contrast, and whether all important elements remain inside the required area.

Related guide: The interior file and cover must agree on trim size, page count and production specifications. Our book cover design checklist explains what to confirm with the designer.

Before upload, proofread the title, subtitle, author name, series name, back-cover copy, ISBN details if applicable, and any text on the spine. Make sure the metadata entered in the KDP setup matches the book files. Differences in spelling or subtitle wording can confuse customers and may cause avoidable corrections.

Export the interior in the format accepted for your chosen print setup and verify that the cover uses the exact file requirements displayed in your account. Keep editable source files and a final export separately, with clear version names. Do not overwrite the only working file with a last-minute change.

Do not assume the ebook and paperback use the same layout

A reflowable ebook adapts its text to the reader’s screen and chosen font settings. A print interior has fixed pages. A layout that works in print may create awkward spacing or navigation problems on an e-reader, while a simple ebook file may not give you the typographic control required for a designed print edition. Treat each format as its own deliverable and test it in the appropriate preview environment.

5. Use the Previewer and review a physical proof

Open the uploaded files in KDP’s Print Previewer and inspect the entire book, not just the opening pages. Look at chapter openings, tables, illustrations, page numbers, blank pages, headers, footers, and the final page. Fix every warning you understand, then re-upload and preview again. An upload accepted by a platform is not the same thing as a book that has been carefully proofed.

Related guide: A print preview catches layout problems, but it does not replace a final text check. Use our editing vs proofreading guide to choose the right editorial check before release.

When practical, order a physical proof before the public launch. A screen preview cannot fully show paper tone, trim, ink density, binding, and how a cover feels in the hand. Read several sections and scan the whole book for repeated layout defects. For a book with complex tables or images, review every spread more closely.

If you need help, see book formatting services or Amazon KDP publishing support. For an end-to-end publication plan, you can also explore book publishing services.

Run a repeatable preflight instead of relying on one preview

Upload the files and review them at normal reading size, not only as tiny thumbnails. Look at the beginning, middle and end, plus every page with unusual formatting. Pay special attention to chapter starts, images, equations, tables, footnotes, page numbers, running heads and any elements close to the trim edge. Previewers can identify many problems, but they cannot decide whether the reading experience feels professional.

When available, order a physical proof before approving a print edition. Check whether body text is comfortable to read, whether the gutter makes the text feel cramped, whether images reproduce as expected, whether the cover colours and spine appear acceptable, and whether the book lies open well enough for its intended use. If you find an error, correct the source file and regenerate the final output; avoid making isolated edits to the wrong file.

Amazon’s current KDP paperback formatting guide explains the interior and cover file requirements and links to its tools. Platform requirements can change, so recheck the official instructions immediately before submission.

For cover dimensions, page count and other production details, see the separate book cover design checklist. A correct interior and a correct cover should be reviewed as one publishing package.

Check the current KDP specifications before upload

Print specifications can change and depend on trim size, paper, page count and whether the interior uses bleed. Use the official instructions that apply to the exact format you are uploading, and make your final files conform to that version of the requirements.

Reference: Amazon KDP paperback formatting guide.