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CSV ↔ Excel Converter

Convert a CSV file to Excel, or an Excel file to CSV.

📊Tap to choose a .csv or .xlsx fileor drop it here

    Conversion happens on your device. Files are never uploaded.

    How it works

    1. 1Choose a .csv or .xlsx file.
    2. 2Convert — the tool detects the format automatically.
    3. 3Download the converted file.

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    About this tool

    Turn a plain CSV file into a proper Excel workbook, or export an .xlsx spreadsheet back to CSV for import into another system. The tool detects which direction to convert based on the file you choose, and everything runs locally so your data never leaves your device.

    Does it work both ways?

    Yes, choose a .csv file to get an .xlsx, or an .xlsx file to get a .csv — the tool detects the format automatically.

    Are formulas or formatting preserved?

    CSV has no concept of formulas or styling, so converting to CSV keeps values only; converting to Excel creates a plain single-sheet workbook.

    Is my spreadsheet uploaded anywhere?

    No, conversion happens entirely in your browser.