Convert CSV to an Excel .xlsx file and Excel back to CSV, entirely in your browser. Works in both directions.
How to use the CSV / Excel
Choose a direction: CSV to Excel or Excel to CSV.
Paste your CSV, or upload an .xlsx file.
Download the converted file, or copy the CSV.
Frequently asked questions
No. The conversion runs entirely in your browser with SheetJS, so your spreadsheet never leaves your device.
When converting Excel to CSV, you can pick which sheet to export, since CSV holds a single table. CSV to Excel produces a workbook with one sheet.
Modern .xlsx files and older .xls files can be read. Output is always the modern .xlsx format.
A two-way CSV and Excel converter: turn CSV text into a downloadable .xlsx workbook, or read an Excel file and export any sheet as CSV.
It uses SheetJS and runs locally in your browser, so it is fast and your data stays private.
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