Why was my KDP cover rejected?
The top five reasons KDP rejects a cover: (1) wrong dimensions, usually because the spine width was calculated with the wrong paper type or page count; (2) DPI below 300 on the final file; (3) critical text or imagery inside the 0.25 inch bleed zone that gets cropped; (4) artwork or dark backgrounds inside the 2 x 1.2 inch barcode-clear zone; (5) AI-generated content with visible artifacts or low quality. Fix each by recalculating with the official KDP template, exporting at 300 DPI CMYK, and keeping all text inside the safe zone. KDP usually sends a rejection email with the specific reason within 72 hours.
How do I fix a blurry KDP cover?
Blurry covers almost always come from upscaled raster images: a 1500 pixel source enlarged to 3000 pixels prints fuzzy. Fix it by re-exporting from the original source at the final pixel size at 300 DPI rather than upscaling. If you only have a low-res source, generate a fresh version with an AI generator at the target resolution, redraw vector art, or commission a higher-res replacement. Check exported PDFs at 100% zoom on screen; if edges look soft on a sharp display, the print will look worse. Avoid JPEG compression artifacts by exporting source images as PNG before placing them on the canvas, then flattening to PDF on final export.
Why are colors shifting on my printed KDP cover?
Color shift between screen and print is almost always a CMYK conversion issue. Screens display RGB and KDP prints CMYK, so saturated RGB greens, blues, and neons that look vivid on screen render duller in CMYK. Fix it by designing in CMYK from the start, or exporting your final PDF in CMYK with an embedded US Web Coated SWOP v2 ICC profile so the conversion is predictable. Order a $5 proof copy via KDP before going live to confirm print appearance, then adjust saturation, brightness, or color choices if the proof looks wrong. Avoid pure RGB blacks (R0 G0 B0) on print covers; use rich black (C60 M40 Y40 K100) instead.
Why are fonts missing or substituted on my KDP cover?
Fonts go missing when the export PDF does not embed them and the print system cannot find a substitute, so it falls back to a default that looks wrong. Fix it by enabling Embed All Fonts in your design app export settings (Adobe Illustrator: PDF preset > Advanced > Fonts; Affinity Designer: Export > More > Embed Fonts). If a font has restrictive licensing that blocks embedding (some "personal use only" fonts do), the simplest fix is to convert text to outlines or curves before exporting so the type is drawn as vector shapes rather than glyphs that need a font file. Always preview the exported PDF on a different machine to catch embedding failures.
Can I change my KDP cover after publishing?
Yes. Log into KDP, open your Bookshelf, click the three dots next to the title, select Edit Paperback (or Hardcover or Ebook) Content, and upload a new cover PDF or JPG. The new cover replaces the old across Amazon within 72 hours, and KDP runs the same review on the replacement. Reviews and ratings carry over because the ASIN does not change. You can update unlimited times for free, which makes A/B testing different covers feasible. Existing physical copies already printed will keep the old cover; only new prints get the update.
How long does KDP take to review my cover?
KDP cover and book reviews typically complete within 72 hours, though most process in 24-48. The clock starts when you click Publish, not when you finish uploading. If your cover has technical issues (wrong dimensions, low DPI, missing bleed) you receive a rejection email with a specific reason within the same window, and the title moves back to Draft status until you resubmit. Updates to existing live books (cover swaps, blurb edits) are usually faster, often live within 12-24 hours. Higher-risk genres and first-time accounts can take longer because they go through additional manual review.
Do I need different covers for each KDP marketplace?
No, in most cases. The same cover PDF is used across Amazon US, UK, EU (Germany, France, Spain, Italy, Netherlands), Japan, Canada, Australia, Mexico, and Brazil. KDP distributes your single cover globally, and the only marketplace-specific element is the barcode, which Amazon auto-applies per region. The exception is if you want localized titles, taglines, or back-cover copy: in that case you publish separate language editions, each with its own ISBN and its own cover PDF, but the technical spec (dimensions, bleed, DPI, CMYK) stays identical across all marketplaces.
