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Merge Faire and Facebook Marketplace Sales Data for Xero Import

Xero's bank/sales import works best with a single uniform sheet, which is hard to get directly from two different platforms' raw exports.

Why Faire and Facebook Marketplace exports don't line up

Faire: an order date shown alongside a separate ship date for wholesale orders; wholesale unit price plus a Faire commission column, distinct from retail-style totals; an order number tied to a retailer account rather than an individual consumer. Also, quantities are per case/pack rather than per unit, which throws off totals if merged as if it were a retail export.
Facebook Marketplace: an order date recorded through Meta's commerce backend; item total and a Meta selling fee where checkout is enabled; an order ID formatted differently depending on whether Shop Pay or Meta Pay processed the transaction. Also, many sellers use Marketplace only for listings with no built-in checkout, so exports may only exist via a connected store's own platform.

For xero import, 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 Faire export and map its columns once.
Drop in your Facebook Marketplace 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.