CSV to Excel - Convert CSV to XLSX Free

Upload your CSV file and the tool converts it to an .xlsx spreadsheet in your browser. Download it when done.

Yes, free forever with no signup.

Yes. The converter works in any modern mobile browser.

Cell values, rows, and columns carry over. Complex formulas and styling do not apply since CSV is plain text.

No. Conversion happens in your browser, so your files never leave your device.

Exports from shops, forms and analytics tools usually arrive as plain CSV text. Converting creates a real XLSX workbook that Excel opens as a proper table with rows and columns. From there you can filter, sort and format, which plain CSV text barely supports on its own.

Yes — The result is a standard XLSX file that opens in Microsoft Excel, Google Sheets and LibreOffice Calc alike. Conversion runs in your browser, so you download the spreadsheet and import it wherever you work. Rows, columns and values carry over exactly during the process.

The source file usually uses a different or inconsistent delimiter, such as semicolons instead of commas. Re-export the CSV with one consistent separator, or fix the separators in a text editor before converting. A quick test with a few rows shows whether the columns then split correctly.

Character problems almost always start in the source file, not in the conversion itself. Save your CSV as UTF-8 before uploading, so accented letters and special characters survive intact. After converting, open the XLSX and spot-check a few special characters before you work with the data.

Files up to 100 MB can be converted, and the conversion happens locally in your browser with no upload. For very large exports, open the result on a capable device, because spreadsheet apps slow down with huge workbooks. Check long ID numbers afterwards and format their column as text in Excel if needed.