Upload an .xls or .xlsx workbook, pick the right worksheet, and map your columns — SheetToAnki reads the file completely in your browser.
Excel workbooks often contain more than one worksheet, merged cells, or formulas instead of plain values. Anki has no idea what to do with an .xlsx file directly. SheetToAnki opens the workbook in your browser using the SheetJS library, lets you choose exactly which worksheet holds your study data, and converts only that sheet into a clean, importable CSV.
If your file has several tabs — say, one per chapter or unit — SheetToAnki lists every worksheet by name and row count so you can pick the right one before mapping columns.