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CSV and Excel Converter
Convert CSV text to an .xlsx workbook or export an Excel worksheet as UTF-8 CSV, free in your browser. Your data stays on your device.
Run it in your browser
Free · no sign-up · files stay on your device
Everything runs in your current browser. Selected files and text are not sent to our servers. Some tools download a small engine the first time you run them.
Launch the toolHow to use it
- Choose CSV to Excel or Excel to CSV.
- Enter CSV text, or choose an Excel file and worksheet.
- Download the converted file.
Frequently asked questions
Is my spreadsheet data uploaded?
No. Files are read and converted in your browser.
Can I choose among multiple worksheets?
Yes. You can select which worksheet to export from the workbook.
Are CSV exports encoded as UTF-8?
Yes. CSV downloads include a UTF-8 BOM to improve compatibility with spreadsheet apps.
What Excel files are supported?
The tool accepts .xlsx and .xls workbooks up to 20 MB and reads up to 20 worksheets.
How large can CSV input be?
CSV text can be up to 5 MB. Each worksheet is also limited to 250,000 rows and 250,000 cells.