Why KDP Keeps Rejecting Your eBook (and How to Fix It)
Amazon KDP rejected your eBook again? Discover the 5 most common formatting errors that trigger KDP rejections and how to catch and fix them before you upload your file.
By Magnus | Published 2026-04-16 | Category: KDP
Most KDP rejections are caused by fixable issues: mismatched margins, missing or corrupted fonts, low-resolution images, EPUB structure errors, and page dimension mismatches. Designed books are especially sensitive because layout tools can produce complex fixed-layout output.
The 5 Most Common Reasons KDP Rejects Your eBook
1. Mismatched Margins
For fixed-layout eBooks, the declared page dimensions need to match the source design. Print margins and bleed settings can create unexpected cropping or alignment problems after conversion.
2. Corrupted or Missing Fonts
Fonts used by the source design need to be handled correctly in the EPUB. Missing font data can lead to substitution and broken typography.
3. Image Resolution Issues
Visual books rely heavily on image quality. Compression or a low-quality source export can create a poor reading experience and submission problems.
4. EPUB Structure Errors
EPUB files contain package metadata, navigation, content documents and other required structures. Invalid XML or missing package components can cause validation failures.
5. Page Dimension Mismatches
Fixed-layout pages need consistent and intentional dimensions. Unexpected page-size differences can break rendering and validation.
Why Visual/Designed Books Get Rejected More Often
Cookbooks, children’s books and workbooks combine precise positioning, custom fonts, images, transparency and non-standard page dimensions. General-purpose text converters are not always designed around those constraints.
- Complex multi-element layouts
- Custom embedded fonts
- High-resolution images
- Transparency and layered design elements
- Non-standard page dimensions
How to Catch These Errors Before Uploading to KDP
Manual Checking
EPUBCheck can identify structural and syntax errors, while Kindle Previewer can reveal rendering problems. Manual review still requires combining several checks.
Automated Audit
MJ Convert Systems runs a pre-conversion audit and then performs visual validation against the source PDF before an output is released.
The Pre-Upload Checklist
Source File Checks
- Export at the highest quality setting available
- Verify fonts are embedded where licensing permits
- Check image quality and resolution
- Review transparency and flattening behaviour
- Confirm page dimensions are intentional and consistent
EPUB Conversion Checks
- Run EPUBCheck and resolve structural errors
- Preview the book on the target reading environment
- Verify fonts are present in the EPUB package
- Confirm fixed-layout metadata is correct where required
- Confirm declared page dimensions match the source
KDP Upload Checks
- Use KDP’s previewer before publishing
- Verify title and author metadata
- Verify the cover meets current KDP requirements
What to Do If KDP Already Rejected Your File
Read the rejection message carefully, run structural validation on the current EPUB, identify the root cause, and re-convert from the original source rather than repeatedly patching a broken output.
Learn how to convert a Canva PDF to Kindle, fix KDP page misalignment, or compare Calibre with MJ Convert Systems.
Frequently Asked Questions
- How long does it take KDP to review a rejected eBook?
- After you resubmit, KDP’s review typically takes 24–72 hours. During peak periods, it can take longer.
- Can KDP reject an eBook after it has already been published?
- Yes. KDP can flag and unpublish books that fail quality checks after publication.
- What image resolution does KDP require for Kindle eBooks?
- KDP recommends a minimum of 300 DPI for images in Kindle eBooks. For fixed-layout books, 300 DPI or higher is a practical quality target.
- Does KDP give specific error messages when it rejects an eBook?
- KDP error messages can be vague and may not identify the exact page or element, which is why pre-upload validation is useful.
- What EPUB version does KDP accept?
- KDP accepts EPUB 2 and EPUB 3. Designed fixed-layout workflows commonly use EPUB 3.
- Can I fix a KDP rejection without re-doing the entire design?
- Often yes. Export settings, font embedding, image quality, EPUB structure and page dimensions can usually be corrected without redesigning the book.
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