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Merge Wix and Wayfair Sales Data for Multi-Store Reporting

Reporting on multiple storefronts only works cleanly once every store's export uses the same column layout.

Why Wix and Wayfair exports don't line up

Wix: a Date Created column; a Total column with tax handling that varies by store region; an Order # formatted as a short number. Also, product options (size, color) are appended into the item name rather than given their own column.
Wayfair: a purchase order date distinct from the ship date required by Wayfair's supplier terms; wholesale cost, freight allowance, and Wayfair's referral fee as separate columns; a Purchase Order (PO) number rather than a typical order ID. Also, built for suppliers rather than direct-to-consumer sellers, so column names lean toward logistics (PO, ship window) rather than retail checkout fields.

For multi-store reporting, that mismatch is exactly what causes hours of manual cleanup every period.

Open CSV Experts and set your target columns once (Date, Channel, Order ID, Total).
Drop in your Wix export and map its columns once.
Drop in your Wayfair export and map it the same way — both merge into one sheet, normalized.
Export as CSV or Excel. Same-layout files merge automatically next time.

No. Everything runs in your browser using JavaScript — your files are never sent to a server.

Yes. Add as many source files as you want; each distinct file layout is mapped once and remembered.