Free product data tool

Find catalog problems before they break your store, feed, or ads.

ONNO checks duplicate SKUs, missing titles, invalid prices, currency, image URLs, product URLs, GTIN formats, units, formula injection risks, and variant conflicts.

Upload a catalog

Deterministic checks

Rules run without AI, so results are repeatable and explainable.

Excel-ready report

Issue CSV exports include row number, field, original value, and suggested fix.

Private by default

Uploaded files, reports, and app pages are excluded from public indexing.