About
About CatalogPrep
CatalogPrep is a free, browser-based image-compliance audit that checks product photos against the exact, sourced rules of 20+ marketplaces - so sellers fix what would be suppressed before they upload.
Run free image auditBrowse all rulesWhat CatalogPrep is
CatalogPrep checks your product images against each marketplace's published image requirements and tells you, per image, exactly what would fail and why - citing the official rule and the date we last verified it. The compliance audit runs entirely in your browser: no signup, no upload to our servers for the free check.
Who it's for
E-commerce sellers, brands, and agencies managing product catalogs across multiple marketplaces - anyone who has had a listing suppressed or rejected over an image and wants to catch it before upload.
How it works
1. Audit - upload product images and CatalogPrep checks each against the exact, sourced rule for your marketplace.
2. Fix - repair what would fail (background, framing, resolution, format) with AI or guided edits.
3. Export - download a marketplace-ready pack that separates ready, auto-fixed, flagged, and original images.
Our commitment to accuracy
We publish only rules that exist in official marketplace policy - each with its source URL and last-verified date - and we never invent or approximate a rule. When a rule changes, we record it in our public changelog. Read exactly how we source and verify on our methodology page.
Who builds it
CatalogPrep is built by an independent team focused on marketplace image compliance. We are not affiliated with Amazon, Walmart, eBay, or any other marketplace; we document their published rules so sellers can follow them.
Contact
Spotted a rule that looks out of date, or have a marketplace you'd like covered? Reach the team through the in-app support chat - accuracy reports are always welcome.