Catalog Readiness Checker is a free tool from Vermilion Ridge for merchants and ecommerce teams reviewing product CSVs. It recognizes current and legacy Shopify exports, flags duplicate variant combinations, missing product facts and offer-format conflicts, and separates catalog issues from expected shopping-feed preparation. Search findings by source row, filter by priority, and download the complete findings report. Catalog processing stays in your browser: no signup, Shopify connection or catalog upload. Includes a fictional guided demo. It does not edit your store, simulate imports, verify live URLs or inventory, or guarantee platform acceptance.