Does the data get uploaded?

No. All processing happens in your browser.

What Excel version is the output compatible with?

The output is a standard XLSX file compatible with Excel 2007 and later, as well as Google Sheets.

Numbers and dates are detected and formatted correctly in the Excel output.

Currently one file at a time. Bulk conversion coming soon.

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

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

Coming soon — full implementation in progress

Click the upload area or drag & drop your CSV file.

The tool maps CSV columns to Excel cells instantly.

Download your Excel file.

Convert Excel (XLSX, XLS) files to CSV 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.