Upload a workbook, pick a sheet if there is more than one, download CSV. Everything runs in your browser — nothing is uploaded.
1
Upload an Excel file
.xlsx / .xls
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Result
Common questions
What happens to formulas and formatting when I convert to CSV?
CSV only stores plain values, so formulas convert to their last calculated result, and all formatting, colours, and cell styles are dropped — this is a limitation of the CSV format itself, not something this tool chooses to remove.
Can I convert a workbook with multiple sheets?
Yes. Every sheet is converted, and you can switch between them to download each one as a separate CSV file.
Does this work with older .xls files as well as .xlsx?