Why KDP Rejected Your Book Cover
and How to Fix It

If KDP rejected your book cover, start with the reason in the rejection email or upload warning. The fix may involve the cover size, bleed, spine text, barcode, image quality, or book details. Correct that issue in the design file, export again, and check the revised upload before submitting it.

First, confirm which edition failed. Paperback, hardcover, and Kindle ebook covers need different files. A cover prepared for one format may need changes before you can use it for another.

Read the rejection message before changing the design

KDP checks print files in two stages. Print Previewer runs an automated check during setup. After submission, KDP also reviews the interior and cover manually. Passing Previewer therefore does not guarantee approval. Amazon explains both stages in its formatting troubleshooting guide.

Save the full rejection message. Note which edition it names and whether it points to the cover or interior. Then match the problem to the relevant section below. If KDP gives expected dimensions, keep those measurements beside you while editing.

Fix the full cover size and spine width

A print cover includes the back, spine, and front. Your book's trim size describes the finished page size, so it is only part of the cover calculation.

Use the KDP cover calculator to generate a template for the binding, ink, paper, reading direction, trim size, and page count selected in your KDP setup. Compare those entries with your book before downloading the template.

Then check the dimensions of the exported PDF. A correctly sized design can still produce the wrong PDF if the export adds margins or changes the page size.

Avoid stretching the finished cover to make it fit. Adjust the canvas and position the front, spine, and back against the new template. Stretching everything can distort the artwork and move text away from its intended position.

Finish the interior before rebuilding the cover

KDP's cover preparation guide says to use the final formatted page count. Changes to the interior can change the spine width, even when the front cover artwork stays the same.

Hypothetical example: a designer builds a cover for 180 pages. After you change the interior font and spacing, the book has 200 pages. The cover now needs a template for the revised interior. Moving the spine title alone will not correct the overall dimensions.

Include the front matter, back matter, and blank pages in your check. If unwanted blanks are changing the interior, fix them first using our guide to KDP blank pages and how to fix them in Word.

Extend the background into the bleed

Bleed is artwork that extends beyond the line where the cover will be cut. Paperback covers need bleed even when the interior does not. Backgrounds that reach the edge must extend 0.125 inch beyond the trim line on the outside edges. KDP's cover size troubleshooting instructions describe this requirement.

Extend the background color or image into that area. Adding empty canvas around the design will leave a border instead of extending the artwork.

Check the exported PDF for an extra white frame. Also check whether your software has added bleed around a template that already includes it. Compare the final PDF dimensions with the calculator before uploading again.

Keep cover text inside the safe area

For paperback covers, KDP requires front and back cover text to sit at least 0.125 inch inside the trim lines. Spine text needs at least 0.0625 inch of space on each side. Text must also be readable, with a minimum size of 7 points. See the paperback cover text requirements.

Move text inward where needed. Use a larger font if the minimum is hard to read. Check the contrast against the background, and keep front and back cover text out of the spine.

Remove spine text when the book is too thin

KDP rejects spine text on paperbacks with fewer than 79 pages. Its Cover Creator tool requires 80 pages. Plan on at least 80 processed pages and confirm that the text fits the spine's safe area.

If KDP flags the page count, remove the spine text and export again. Shrinking it will not fix the restriction. The paperback cover guide explains the limits.

Leave room for the barcode

KDP can add a barcode when your uploaded cover does not include one. Keep text, logos, and other artwork out of the barcode space marked on your template. A barcode can cover part of a blurb or illustration if the layout leaves no room for it.

If you supply your own barcode, check that it is sharp, has a white background, and uses the correct ISBN for that edition. KDP lists its dimensions and placement rules in the barcode requirements.

For a barcode validation error, KDP offers two routes: correct the supplied barcode or remove it and let Amazon add one. If you choose the second route, check the barcode selection during upload and inspect its placement in Previewer.

Replace blurry images and check the export quality

KDP calls for print cover images at least 300 DPI. The image needs enough pixels at its final printed size. Changing a resolution label alone does not create missing detail. Amazon includes the image requirement in its file specifications.

Hypothetical example: an image that is 900 pixels wide and printed 6 inches wide has 150 pixels per inch. At that printed width, 300 pixels per inch requires 1,800 pixels across. Start with a larger source image or use the existing image at a smaller size.

Inspect the PDF you will upload. Export settings can reduce image quality even when the source artwork looks clear. Watch for blurred lettering, jagged edges, and compression marks around illustrations.

Export one complete print cover PDF

Keep the back, spine, and front on one PDF page. Do not export them as three separate pages. If KDP reports that the cover has more than one page, check the PDF's page count before resubmitting.

For print cover exports, embed the fonts, flatten transparent effects, remove template guides and crop marks, and turn off password protection. KDP includes these checks in its print cover export checklist.

Open the exported file and inspect it separately from the design project. Check that all text appears, the background reaches the outer edge, and no guide labels remain. A file extension alone does not confirm that the PDF contains the right layout.

Match the cover to the book details

The title, subtitle, author name, and series information on the cover should match the corresponding KDP fields. Amazon states this in its metadata guidelines.

Compare the wording character by character. Look for an old subtitle, a missing middle initial, or a series number left over from a previous design. Check the spine and back cover too.

If the rejection concerns misleading content or permission to use an image, review the specific issue against KDP's content guidelines. A size adjustment will not resolve that type of rejection. Keep the relevant image license or permission records available if KDP requests them.

Use a separate template for a hardcover

A hardcover cover includes material that wraps around the boards. It also has hinge areas beside the spine. Those measurements differ from a paperback cover, even when the interior trim size is the same.

Generate a hardcover template and position the artwork within its marked areas. Keep lettering and barcodes out of the hinges. Follow the hardcover cover requirements rather than adapting the paperback dimensions by eye.

Check Kindle ebook covers separately

A Kindle cover upload uses the front cover image. Leave out the print spine, back cover, and barcode. KDP's Kindle cover guidelines also distinguish upload failures from quality warnings.

A useful export target is a JPEG in RGB color at 1,600 pixels wide by 2,560 pixels high, under 50 MB. KDP lists these dimensions as recommended, so a warning about falling below that recommendation is not the same as a failed upload. Read the specific message before changing the file.

Keep the title and author information consistent with the ebook listing and the cover inside the ebook. Also remove watermarks, template text, prices, and temporary promotional wording.

Upload the correction and submit it for review

Once the revised file is ready, follow KDP's cover update instructions:

1. Open the book in your KDP Bookshelf and choose the content editing option for the affected format.

2. Go to the cover section and upload the revised file, or reopen Cover Creator if that is where you made the cover.

3. Wait for processing to finish, then launch Previewer.

4. Inspect the changed area and the rest of the cover. For print books, check the trim, spine, and barcode placement.

5. Resolve any remaining errors and approve the preview.

6. Select Save and Continue, then use the publishing button on the pricing page to submit the revision.

Saving an upload is only part of the process. KDP reviews the submitted update again.

If KDP rejects the cover again

Compare the new notice with the previous one. A second rejection may identify a different issue. Keep a short record of the filenames, upload dates, and changes so you can confirm which version KDP reviewed.

If you used Cover Creator, make sure the interior finished processing before you built the cover. Amazon warns that starting too soon can produce a spine width that does not match the interior.

If the notice remains unclear, contact KDP with the full message, affected format, current print settings, and a screenshot of the flagged area. Ask which requirement is still unmet.

Start with one action now: open the rejection notice and identify the exact issue it names. For a size or spine error, confirm the processed interior page count before downloading a fresh template. Then make the correction, inspect the export, and resubmit the matching file.