XLSX to CSV Converter

Free, no sign-up. Your files never leave your device.

CSV delimiter

Comma works for Google Sheets, most apps and English-language Excel; Excel in many European locales expects a semicolon. The file is saved as UTF-8.

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How to convert XLSX to CSV

  1. Click the box above or drag your XLSX files onto it — you can add many at once.
  2. Wait a moment while your browser converts them. Nothing gets uploaded.
  3. Download each CSV separately or grab them all in one ZIP file.

Why use this converter

  • Your files stay with you

    Conversion runs on your device. Documents are never uploaded, so nobody but you can see them.

  • Your choice of delimiter

    Comma for apps and Google Sheets, semicolon for Excel in many European locales, tab for TSV.

  • Values, not formulas

    The CSV gets cell values as Excel shows them, with dates written as 2024-07-15.

  • Many files at once

    Add up to 100 files at a time and download the results as one ZIP.

Frequently asked questions

Which sheet goes into the CSV?

The workbook's first sheet. A CSV holds one sheet, so if there are several, the file's row shows a warning.

What happens to formulas?

The CSV gets the values Excel saved in the file at its last recalculation, not the formulas themselves.

How are dates written?

Dates as 2024-07-15, dates with time as 2024-07-15 14:30:00 — understood by both apps and Excel.

Which delimiter should I choose?

Comma works for Google Sheets, most apps and English-language Excel. Excel in many European locales expects a semicolon — pick it in the settings if Excel shows everything in one column.

Which encoding is the CSV in?

UTF-8 with a BOM, so Excel opens it without garbled characters.

Does the old XLS format work?

No, only XLSX — the format of Excel 2007 and later. You can re-save an XLS file as XLSX in Excel.

Is it safe?

Yes. Only the converter itself is loaded from the site; your file is processed in your browser and never sent to a server.

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