KERF
Deterministic print-PDF preflight diagnostics for Amazon KDP and IngramSpark.
KERF is designed to help independent authors, book designers, and self-publishers identify potential technical issues in print-ready PDFs prior to submission. It is being built to evaluate trim geometry, bleed margins, spine calculations, and PDF box consistency against published Amazon KDP and IngramSpark requirements.
Access & Information
Review diagnostic specifications, technical rule coverage, and preflight workflow details on the dedicated product page.