KDP PDF checking
Check your full-wrap KDP cover
Measure the complete back-spine-front cover as one PDF page.
Technically reviewed · September 1, 2026
What this issue means
Cover width depends on trim, bleed, paper and final page count. The checker separates those inputs, the submitted MediaBox and the protected spine and barcode regions so a size mismatch is traceable.
What BookPreflight checks
- Expected full-wrap width and height
- Spine width and text clearance
- Bleed edges and barcode safe zone
How to correct the source file
- 1
Use the final interior page count and paper type.
- 2
Export one continuous cover page without crop marks.
- 3
Recheck after every page-count or paper change.
Verify the exported PDF, not the preset name
Keep the editable source and original PDF. Export a new file, run the complete scan again and review every remaining finding. A repair is only labelled safe after loss checks and a full deterministic post-flight.
BookPreflight is an independent tool. It is not affiliated with or endorsed by Amazon or Kindle Direct Publishing, and it cannot guarantee acceptance.