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Merge Etsy and Wayfair Sales Data for Side Hustle Bookkeeping

Running sales channels as a side hustle usually means doing your own books, which gets tedious fast once more than one platform is involved.

Why Etsy and Wayfair exports don't line up

Etsy: Sale Date, usually already in your local timezone; Item Total, Shipping, and Etsy fees as separate columns, before tax; a numeric Order ID shared by every item in the same order. Also, listing titles are included in full and often contain commas, which can shift columns if opened carelessly in Excel.
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 side hustle bookkeeping, 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 Etsy 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.