Uploading a cover to KDP is the single most error-prone moment in self-publishing. The good news: cover rejections come from a small, predictable set of issues, and every one of them is fixable in under an hour. This guide is the 2026 reference: accepted file types, the exact step-by-step upload flow, and the fix for every common rejection reason.
KDP Cover Upload Requirements Checklist
- File format: PDF (preferred), PNG, JPEG, or PSD for print covers. JPEG or TIFF for ebook covers.
- File size: 650 MB maximum for print covers, 50 MB maximum for ebook covers
- Resolution: 300 DPI minimum for placed images on print covers
- Color profile: CMYK recommended for print, sRGB required for ebooks
- Bleed: 0.125 inches on all outer edges for print covers, none for ebook covers
- Safe zone: Keep all text 0.125 inches inside the trim line
- Barcode space: 2 inches x 1.2 inches clear area on bottom-right of back cover
- Spine text: Only allowed on books with 80 or more pages
- Fonts: All fonts must be embedded or converted to outlines
Step 1: Pick the Right File Format
KDP accepts four file formats for print covers (paperback and hardcover) and two formats for ebook covers. Each has trade-offs.
PDF (preferred for paperback and hardcover)
PDF preserves vector text, embedded fonts, and color profiles. It is the only format that survives KDP's internal processing without color shifts or font substitution. Always export with "embed all fonts" enabled and bleed marks turned on.
PNG
Accepted for paperback and hardcover, but PNG flattens everything to raster and supports only RGB color, so KDP must auto-convert to CMYK on the printer side. Color accuracy is unpredictable. Use PNG only if your design software cannot export PDF.
JPEG
Accepted for paperback, hardcover, and Kindle ebook. JPEG compression can introduce visible artifacts in solid color areas and text edges. Save at maximum quality (12 in Photoshop). For Kindle ebook covers, JPEG is the standard choice.
PSD (Photoshop)
Technically accepted for paperback and hardcover, but the conversion on KDP's servers can swap unembedded fonts and shift colors. Always flatten the PSD and export to PDF instead of uploading raw PSD.
TIFF
Accepted for Kindle ebook covers only. Very large files with no compression. Most authors stick with JPEG for ebook covers because TIFF files can exceed the 50 MB ebook cover limit.
Quick file format decision
Paperback or hardcover: Export PDF with embedded fonts, 300 DPI, CMYK.
Kindle ebook: Export JPEG at 1,600 x 2,560 pixels, maximum quality, sRGB.
Both formats from one source file: Design the print cover first, then export the front panel separately as a JPEG for the ebook listing.
Step 2: KDP Cover Creator vs Your Own Cover
KDP Cover Creator (built-in tool)
KDP includes a free in-browser cover designer with stock backgrounds, text editing, and pre-made layouts. The pros: no design software needed, automatic spine width calculation, and the file is guaranteed to be the correct dimensions. The cons: limited stock images, generic typography options, and your cover will visually resemble every other KDP Cover Creator cover on Amazon.
Use KDP Cover Creator only for absolute first launches when you have zero budget and zero design skills. As soon as you can, switch to an uploaded cover.
Upload your own cover (recommended)
Uploading a custom cover gives you full control over typography, imagery, and brand. Build the cover in Photoshop, Affinity Publisher, InDesign, Canva Pro, or an AI cover generator. The two most common approaches:
- Design from scratch: Photoshop or Affinity Publisher with a downloaded KDP template
- AI cover generation: Tools like our AI book cover generator output print-ready PDFs at the exact KDP dimensions
Either way, you need the exact dimensions for your specific book before designing. The KDP cover size calculator outputs total width, height, and spine width in seconds based on your trim size and page count.
Skip the Cover Math and Generate a Print-Ready PDF
Our AI book cover generator outputs KDP-compliant PDF covers at the exact dimensions for your trim size and page count. No spine calculations, no bleed mistakes.
Step 3: The Upload Flow
Once your cover file is ready, the upload itself is mechanical. Here is the exact sequence on KDP in 2026.
1. Open your book in the KDP Bookshelf
Sign in at kdp.amazon.com. The Bookshelf page lists every book on your account. For a new book, click "+ Create" and select Paperback, Hardcover, or Kindle ebook. For an existing book, click the three-dot menu next to the book title and choose "Edit Paperback Content" or the matching option for your format.
2. Scroll to the "Book Cover" section
Below the interior file upload, KDP displays the "Book Cover" section. Two large radio buttons present the choice:
- "Use Cover Creator" (the built-in tool)
- "Upload a cover you already have (PDF only)" - despite the label, PNG and JPEG also work for print covers
3. Click "Upload a cover" and select your file
A standard file picker opens. Navigate to your cover PDF (or JPEG, PNG) and click Open. The upload takes 30 seconds to 3 minutes depending on file size and your connection.
4. Wait for the automated quality check
KDP runs an automated quality check on every cover upload. The check inspects file size, page count (for print covers, 1 page only), DPI, color profile, and dimensions. Warnings appear inline in yellow boxes. Critical errors stop the upload and require a fix.
5. Open the 3D book preview
Click "Launch Previewer". KDP generates a 3D rendering of your book showing the spine alignment, cover wrap, and barcode placement. Inspect every panel:
- Front cover: title and author readable, no text in the bleed area
- Spine: text centered, vertical alignment correct, no overlap with front or back panel
- Back cover: description fits, barcode space is clear, no text in safe zone
- Wrap edges: no important artwork inside the 0.125 inch bleed
6. Approve and submit
If the preview looks correct, click "Approve" then "Save and Continue". Submit the book for review. KDP returns a decision in 24 to 72 hours.
Step 4: The 7 Most Common Rejection Reasons
KDP rejects covers for predictable reasons. These seven cover roughly 95 percent of all cover rejections.
1. Low resolution
The problem: Placed images below 300 DPI. The PDF was exported at 300 DPI but the photos and graphics inside were originally 72 DPI screen assets that got upscaled.
The fix: Source every placed image at 300 DPI native resolution. Never upscale before placement. If you need to upscale, use a dedicated upscaler like Topaz Gigapixel or an AI upscaler that produces genuine detail rather than nearest-neighbor stretching.
2. Wrong color space
The problem: RGB cover uploaded for a print book. KDP accepts RGB but auto-converts to CMYK, and saturated reds, oranges, and deep blues shift noticeably during the conversion.
The fix: Export print covers in CMYK using the U.S. Web Coated (SWOP) v2 profile. For Kindle ebooks, sRGB is required and CMYK will be rejected.
3. Missing or excess bleed
The problem: The cover PDF either lacks 0.125 inches of bleed on the outer edges or has bleed on edges where it should not exist (the spine, for example).
The fix: Add exactly 0.125 inches of bleed on the top, bottom, and outer left and right edges. The spine and the join lines between spine and panels have no bleed. Use the KDP template generator to confirm the bleed dimensions.
4. Wrong spine width
The problem: The spine width on the cover does not match what KDP calculates from your page count and paper type.
The fix: Use the formula: page count x per-page thickness (0.002252 inch for white paper, 0.0025 inch for cream, 0.002347 inch for color). A 250 page book on white paper has a 0.563 inch spine. Use the KDP spine width calculator for exact numbers per paper type.
5. Text in safe zone
The problem: Title, subtitle, author name, or back cover description sits closer than 0.125 inches to any trim edge. KDP rejects this because normal trim variance can cut into the text.
The fix: Move all text at least 0.125 inches inside the trim line on every edge. The 3D previewer often highlights the safe zone with a guide overlay. Honor it.
6. Low contrast
The problem: Title or author name text has insufficient contrast against the cover background. This usually triggers on white text over very light backgrounds or dark text over dark photography.
The fix: Add a subtle drop shadow or solid color shape behind text. Aim for a contrast ratio of at least 4.5:1 between text and background. The cover should be legible as a 100 pixel wide Amazon thumbnail.
7. Unembedded fonts
The problem: The PDF references fonts that are not embedded in the file. The printer cannot render unembedded fonts and KDP rejects the cover.
The fix: Enable "Embed all fonts" when exporting the PDF. If your software cannot guarantee embedding (some Canva exports, some older programs), convert all text to outlines before exporting. Outlines remove the font dependency entirely.
Quick rejection lookup
- "Low resolution detected" = upscaled images. Source at 300 DPI native.
- "Color profile not supported" = wrong color space. CMYK for print, sRGB for ebook.
- "Bleed area incorrect" = missing or excess bleed. 0.125 inches on outer edges only.
- "Cover dimensions do not match" = wrong spine width. Recalculate from page count.
- "Text too close to trim" = text in safe zone. Move 0.125 inches inside trim line.
- "Low text contrast" = title hard to read. Add drop shadow or background shape.
- "Embedded fonts missing" = font not in PDF. Embed fonts or convert to outlines.
Step 5: How to Fix a Rejected Cover and Resubmit
Cover rejections feel discouraging but the resubmit process is fast. Most resubmissions clear in 24 hours because metadata is already approved and only the cover file is re-reviewed.
- Read the rejection email carefully. KDP specifies the exact reason and often quotes the technical issue.
- Identify the root cause. Cross-reference the rejection against the 7 reasons above.
- Fix in your design software. Re-export the cover with the correction.
- Open the rejected book in KDP Bookshelf. Click the three-dot menu and choose "Edit Paperback Content" (or Hardcover / eBook).
- Scroll to Book Cover, click "Upload a new cover". Select the corrected file.
- Launch the 3D previewer again. Verify the fix shows correctly.
- Click "Save and Submit for Review". KDP re-reviews and typically approves within 24 hours.
Need a second pair of eyes? Walk through the rejection against our KDP cover requirements checklist to catch anything you missed.
Avoid Rejections Altogether
KDPEasy generates KDP-compliant covers with embedded fonts, correct DPI, exact spine width, and proper bleed. Upload once, get approved once.
Step 6: Paperback vs Hardcover vs Ebook Differences
Paperback
Single PDF or JPEG containing back, spine, and front as one continuous spread. Bleed: 0.125 inches on outer four edges. Spine text allowed only when page count is 80 or more (some sources say 79, KDP rounds up). Color: CMYK preferred.
Hardcover
Single PDF containing back, spine, and front in one continuous spread plus a 0.625 inch wrap area on each side that folds onto the inside of the case. No dust jacket flaps. Spine text allowed for hardcovers regardless of page count (the spine is always wide enough). The minimum page count for hardcover on KDP is 75 pages.
Kindle ebook
Front-only image. No spine, no back, no bleed. Required dimensions: minimum 1,600 pixels on shortest side, 2,560 pixels on longest side, 1.6:1 aspect ratio. File format: JPEG or TIFF only (PDF is rejected for ebooks). Color profile: sRGB. Maximum file size: 50 MB.
If you publish in all three formats, design the print cover first (which includes the front panel), then export the front panel separately as a 1,600 x 2,560 JPEG for the ebook.
Ebook Cover Specifications in Detail
Ebook covers have stricter spec requirements than print because they display on small Kindle devices and Amazon thumbnails.
- Dimensions: 1,600 x 2,560 pixels minimum (Amazon's recommended)
- Aspect ratio: 1.6:1 height-to-width
- File format: JPEG (preferred) or TIFF
- Color profile: sRGB (CMYK rejected)
- Maximum file size: 50 MB
- Resolution: 72 DPI is fine for ebooks (pixel dimensions matter, not DPI)
- Transparency: Not supported - all layers must be flattened
The Amazon search thumbnail displays your ebook cover at roughly 100 to 150 pixels wide. Design titles and authors at a size that remains legible at that scale. Tiny text that looks elegant on a 1,600 pixel preview disappears completely on the thumbnail.
Run Your Spine Math Before You Design
Spine width depends on page count and paper type. Plug your numbers in and get the exact spine width in decimals before opening Photoshop.
Pre-Upload Checklist
Final cover upload checklist
- File format matches the book type (PDF for print, JPEG for ebook)
- File size is under 650 MB for print or 50 MB for ebook
- All placed images are 300 DPI native (not upscaled)
- Color profile is CMYK for print or sRGB for ebook
- Bleed is exactly 0.125 inches on outer four edges (print only)
- Spine width matches page count and paper type to four decimals
- All text is at least 0.125 inches inside the trim line
- Barcode area (2 x 1.2 inches) on back cover is clear of text and artwork
- All fonts are embedded or converted to outlines
- Title is legible as a 100 pixel wide thumbnail
- 3D previewer shows correct spine alignment and no text bleed
Hit every item on that checklist and the upload clears KDP review on the first try roughly 95 percent of the time. The remaining 5 percent are edge cases (specific font conflicts, very large file processing issues) that the resubmit flow handles in 24 hours.
If you want a deeper dive into the pre-export setup, the perfect KDP cover guide covers design fundamentals, while the fix blurry covers guide walks through the specific resolution and upscaling fixes.
Upload a Cover That Gets Approved on the First Try
Our AI book cover generator outputs KDP-compliant PDFs with embedded fonts, 300 DPI native resolution, correct bleed, and the exact spine width for your book.
Frequently asked questions
KDP accepts PDF (preferred for paperback and hardcover), PNG, JPEG, and PSD. PDF is strongly recommended because it preserves vector text, embedded fonts, and color profiles. For Kindle ebook covers, only JPEG and TIFF are accepted - PDF is not allowed for ebooks.
KDP caps cover file uploads at 650 MB. Most properly exported covers come in between 5 MB and 30 MB. If you are approaching the limit, flatten transparency layers, downsample any images above 300 DPI down to 300 DPI, and re-export. A 200 MB cover almost always indicates unflattened raster layers or unembedded images.
300 DPI is the absolute minimum for paperback and hardcover print covers. KDP recommends 300 DPI for all source images placed in the file. If your placed images were upscaled from lower resolution, the effective DPI drops below 300 even if the document DPI is set to 300. Always source assets at 300 DPI native resolution.
KDP Cover Creator is a free built-in tool with stock backgrounds and basic text editing. It is fine for ultra-budget launches but the design options are limited and your cover will look like other KDP Cover Creator covers. For anything you want to actually rank and sell, upload your own design built in Photoshop, Affinity, Canva Pro, or an AI cover generator.
Low resolution detection on placed images. Authors export the PDF at 300 DPI but the photos and graphics inside were originally 72 DPI screen assets that got upscaled. KDP inspects each placed image individually. The fix is to source all assets at 300 DPI native and never upscale before placement.
Read the rejection email carefully - KDP specifies the exact reason. The five most common rejections are low resolution, wrong color space (RGB vs CMYK), missing or excess bleed, wrong spine width, and text inside the safe zone. Fix the specific issue, re-export the cover, then click "Upload a new cover" on the same book listing and resubmit. Most resubmissions are reviewed within 24 hours.
Kindle ebook covers require a minimum of 1,600 pixels on the shortest side and 2,560 pixels on the longest side. The recommended dimensions are 1,600 x 2,560 pixels at a 1.6:1 height-to-width ratio. Files must be JPEG or TIFF, sRGB color profile, with no transparency. Maximum file size is 50 MB for ebook covers.
Paperback and hardcover covers are uploaded as a single PDF containing front, spine, and back as one continuous spread with 0.125 inch bleed. Hardcover adds a 0.625 inch wrap area on each side. Ebook covers are single front-only images at 1,600 x 2,560 pixels with no spine, no back, and no bleed.
KDP requires all text to sit at least 0.125 inches inside the trim line on all four edges. Text closer than that can get cut off during the trimming process. The "safe zone" is the area where text is guaranteed to print. Move title, subtitle, author name, and back cover description text further from the edges until they are 0.125 inches inside the trim.
Initial uploads are reviewed within 24 to 72 hours along with the interior. Cover-only resubmissions after a rejection typically clear in 24 hours because the metadata is already approved. If the upload includes the interior for the first time, expect the full 72-hour window.
KDP technically accepts PSD files but the conversion to PDF on KDP servers can introduce font substitution and color shifts. Best practice is to flatten your PSD in Photoshop, export as a 300 DPI PDF with all fonts embedded, then upload the PDF. This gives you control over the exact output.
If you embed all fonts when exporting the PDF, you do not need to convert to outlines. If you cannot guarantee font embedding (some Canva exports, some older software), convert all text to outlines before exporting. KDP rejects covers with unembedded fonts because the printer cannot render them. Outlines remove this risk entirely.
Written by Danielle Okonkwo
Marketing & Growth Lead at KDPEasy
Danielle is a published author with 12+ titles on Amazon KDP and a former book blogger. She writes KDPEasy's guides drawing from hands-on publishing experience and years of testing what actually works in the KDP marketplace.
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