Files stay on your device

XLSX to CSV Converter

Inspect workbook sheet names, choose one worksheet, and export its displayed values as UTF-8 CSV.

Private browser workspaceInput: XLSX → Output: CSV

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Your file never leaves this browser

Processing happens locally using browser APIs and on-device code. Closing this tab clears the working data.

How it works

Done in three simple steps

Choose an XLSX workbook.

Select a worksheet and delimiter.

Convert and download the CSV.

Good to know

Are my files uploaded?+

No. Your files stay on your device and are processed locally by your browser.

Are formulas recalculated?+

No. The converter reads values stored in the workbook; it does not run Excel calculation.