Excel to CSV Converter
Save every sheet of an Excel file as CSV, as separate files in a ZIP.
Runs on your device · no upload
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About Excel to CSV Converter
Excel to CSV reads an .xlsx workbook and saves each sheet as a CSV file, as UTF-8 so that all languages stay intact. Choose a comma, semicolon or tab separator. The file stays on your device.
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All calculations happen right in your browser.
Use the result
Copy it or download it.
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Save the result. No watermark, no sign-up.
Frequently asked questions
What happens to workbooks with many sheets?
Each sheet becomes its own CSV file, and you can download them all as a ZIP.
Are formulas kept?
You get the values Excel shows, not the formulas.
How are dates written?
As yyyy-mm-dd, which most programs understand.
Can it open old .xls files?
No. Save the file as .xlsx in Excel first.
Are my files uploaded anywhere?
No. This tool runs in your browser, so your file stays on your device and is never sent to a server.
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