No integrations, no store access. The verdict is deterministic rules, not an AI guess — you send two files and we check them against the way Shopify imports actually behave, starting with the two that hurt most: imports that delete live variants, and the overwrite behaviour a duplicate handle triggers. An optional plain-English summary explains the findings; it never decides them.
The entire workflow runs file-side — no OAuth, no app install, no store connection. Two files in, one report out.
Upload your supplier file (CSV — we map standard supplier and Shopify headers, EN/DE/PL) and your current Shopify product export. That's all we need — no app install, no API keys, no store connection.
We normalize headers, prices and variant structure, then run rule-based checks. Duplicate handles, variant-column dependencies, supplier-vs-Shopify price, GTIN validity, image reachability, and more. Every flag traces to a specific rule, never a probability.
A health score, every issue ranked by severity with the reason it matters and a concrete fix, and a clean cleared / review / blocked split. Import the cleared set with confidence; fix the rest before you touch Merchant Center.
A free validator only checks formatting. Preflights reads the structure of your supplier file itself to catch these two before they go live — no store connection needed.
When a file's option columns don't line up with how your products are already built, a Shopify import can remove the existing variants on those products — and imports can't be undone. We check your file's own option structure for that pattern and flag every product at risk, straight from the supplier file — no store export needed.
A handle is a product's unique address in Shopify. When two rows share the same handle, the import merges them into one instead of creating two — quietly overwriting the first product with the second. We flag every handle that appears more than once, so you catch the collision before it rewrites a live product.
Upload your toughest supplier file. We run all nine checks and show your health score + risk counts free, in seconds — unlock the full fix list for $9.
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