KDP Formatting

Categories archive — 159 articles

KDP Formatting · 5 min read

KDP error: EPUB doesn't pass EPUBCheck validation

Last reviewed by Robert Prime — May 2026 Quick Answer: Your EPUB file fails KDP's automated validator. Run it through EPUBCheck (free) at …

KDP Formatting · 5 min read

KDP error: File size over 650MB

Last reviewed by Robert Prime — May 2026 Quick Answer: Your file is above KDP's 650MB cap (or 50MB for Kindle reflowable EPUBs). Reduce file …

KDP Formatting · 5 min read

KDP error: Font not embedded in PDF

Last reviewed by Robert Prime — May 2026 Quick Answer: KDP requires every font used in your PDF to be embedded with full character sets. …

KDP Formatting · 5 min read

KDP error: Image resolution below 300 DPI

Last reviewed by Robert Prime — May 2026 Quick Answer: KDP requires all images in print interiors to be 300 DPI minimum (600 DPI for line …

KDP Formatting · 5 min read

KDP error: Margin too small (gutter or outside)

Last reviewed by Robert Prime — May 2026 Quick Answer: KDP's inside (gutter) margin scales with page count: 0.375" for 24-150 pages, …

KDP Formatting · 5 min read

KDP error: Odd page count in print interior

Last reviewed by Robert Prime — May 2026 Quick Answer: Add one blank page at the end of your PDF (or before the final back-matter section) …

KDP Formatting · 5 min read

KDP error: PDF transparency layers not flattened

Last reviewed by Robert Prime — May 2026 Quick Answer: Your PDF contains transparent layers (drop shadows, transparent PNGs, overlapping …