MapMyCSV

MapMyCSV is a browser-based column mapping tool for CSV and Excel files. Drag and drop a spreadsheet, match its columns to the field names your target system expects, and export a clean file ready for import. Everything runs locally in the browser, so files stay on your device and are never uploaded to a server. You can preview the full mapping result for free before buying, and no account or signup is required to try it. A one-time purchase of $29 unlocks unlimited exports with no subscription and no recurring fees.

Typical uses include preparing customer lists for a CRM import, reshaping product catalogues for an ecommerce platform, and normalising exports from one tool so they load cleanly into another. Saved mapping templates let you repeat the same transformation on future files in a couple of clicks.