Does the file get uploaded?

No. All processing happens in your browser.

What if my Excel file has multiple sheets?

Each sheet is exported as a separate CSV file.

Only the calculated values of formulas are included in the CSV, not the formula expressions.

Yes. Both legacy XLS and modern XLSX formats are supported.

fast

Convert Excel (XLSX, XLS) files to CSV format online for free.

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Convert Excel (XLSX, XLS) files to CSV format online for free.

Coming soon — full implementation in progress

Click the upload area or drag & drop your XLSX or XLS file.

The tool extracts spreadsheet data to CSV format.

Download your CSV file.

Convert CSV files to Excel (XLSX) format online for free.

Convert CSV files to JSON format online for free.

Convert JSON data to CSV format online for free. Download as spreadsheet.