KDP error guide
Check spine text clearance
Measure spine text against the calculated spine edges and clearance zones.
Technically reviewed · September 1, 2026
What this issue means
The spine moves when final page count or paper changes. Reusing an older template can leave text centered visually but outside the current safe zone.
What BookPreflight checks
- Calculated spine width
- Text bounds and edge clearance
- Template dimensions versus current book inputs
How to correct the source file
- 1
Regenerate the template from the final interior specification.
- 2
Center spine text within the new safe region.
- 3
Remove spine text if the available spine is too narrow.
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.