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CSV to Excel (XLSX) Converter — Free & Private (In-Browser)

Convert CSV into a downloadable .xlsx workbook in your browser. Handles quoted fields and large tables. No upload. Free and unlimited.

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How to use CSV to Excel

  1. 1Paste your input into the box, or upload a file.
  2. 2Adjust any options shown above the output.
  3. 3The CSV to Excel runs locally in your browser as you type.
  4. 4Copy the result, or download it as a file.

CSV to Excel FAQ

Is my CSV uploaded to make the Excel file?
No. The workbook is built in memory in your browser via SheetJS; only you get the downloaded .xlsx.