Kindle create book upload problem difference between kcb and kpf

 

KCB (Kindle Create Book)

This is the working file used inside Kindle Create.

Extension: .kcb
❌ NOT uploaded to KDP directly
✅ You open and edit this file inside Kindle Create.

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✅ KPF (Kindle Package Format)

This is the final output file generated by Kindle Create.

Extension: .kpf
✅ This is the correct file to upload on KDP for your eBook.

It includes:

Formatting

Chapters
Table of contents
Images

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🔧 How to Export .kpf from Kindle Create

1. Open your .kcb file in Kindle Create

2. Click on “Publish” in the top-right corner

3. It will generate a .kpf file

4. Save it somewhere like:

   
   Echoes_of_the_Oppressed.kpf
   

5. Now go to KDP, and when it asks for the manuscript upload, upload this .kpf file

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✅ Summary

Format	Use	Upload to KDP?
.kcb	Editable project file inside Kindle Create	❌ No
.kpf	Final export file for Kindle eBook	✅ Yes