Combined Pre-Flight Check · Interior + Cover

Inspect your entire book package before Amazon does.

The #1 reason KDP rejects uploads is spine width mismatches between the manuscript and the cover. Upload both files together to verify spine thickness, trim alignment, and bleed in seconds.

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1. Interior Manuscript (PDF)

Drag & drop your interior PDF, or click to browse

Choose Interior PDF

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2. Full-Wrap Cover (PDF)

Drag & drop your full-wrap cover PDF, or click to browse

Choose Cover PDF

Manuscript Paper Stock (determines spine thickness): KDP calculates spine bulk differently for white (0.002252"), cream (0.0025"), and color (0.002252") paper.

Want to see how it works first? ⚡ Try Sample Book Package (Instant Demo)

🔒 Private & secure. Both files are permanently deleted immediately after preflight validation.