No — it updates them. Every product keeps its original Handle (the URL slug like red-cap). When you import with "Overwrite products with matching handles" ticked, Shopify updates existing listings rather than creating duplicates. Handles we can't detect are generated automatically.

We flag them clearly in the issues list. Shopify imports images by URL only — the image must already be hosted publicly. Upload your images in Shopify under Content → Files first, copy the URLs into your file, then re-run. Accepted formats: JPG, PNG, WEBP, GIF — all must begin with https://.

A variation type is the dimension (Colour, Size, Material). A variation value is the specific option (Red, Large, Cotton). We detect when separate listings are actually the same product in different colours and flag them to merge — one strong listing beats three thin ones in AI ranking. Products with no valid variant values are reclassified as simple products.

The AI enrichment (descriptions, tags, HS codes, categories, use cases) runs via Claude directly in your browser. Your key is never stored anywhere — it goes straight from your browser to Anthropic's API. You can get a key at console.anthropic.com. Usage costs are typically a few pence per 100 products.

Harmonised System codes are 6-digit tariff classifications used globally for customs. They're required for accurate duty calculation on international orders — and increasingly used by agentic checkout systems to process cross-border transactions automatically. Without them, international checkout agents either fail silently or apply incorrect duties.

Shopify CSV, XLSX, JSON, WooCommerce exports, Creoate files, Faire catalogues, and generic spreadsheets. We auto-detect the format and map columns to a canonical schema. Column names don't need to be perfect — we fuzzy-match common variations. You can upload multiple files and we'll merge them into one output.