Observed arrival · 2026-10-31

FormatPaperback checks and repairs KDP paperback PDFs

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Editorial interest 74/100 Selection signal · not a rating of the site

A browser-based tool for checking paperback interiors against Amazon KDP formatting requirements, with paid PDF repair and cover downloads.

Landing page captured for the 2026-10-31 issue.

For: Self-publishing authors preparing KDP paperbacks
Worth noticing: The checker supports no-bleed interiors from 24 to 828 pages and offers safe and tight margin-buffer options.

Field notes

The interface exposes choices for 15 trim sizes, four paper-and-ink combinations and two margin-buffer settings. It limits the stated checker to no-bleed interiors of 24–828 pages, and the cover builder includes trim, spine-fold, bleed, safe-zone and barcode guides. The site also links to separate KDP calculators and reference pages, including a trim-size list and rejection-fix guide.

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

$PaidCommerce or pricing visible

✦PrettyNotable craft visible

◎NicheUnusually specific use

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