Private spreadsheet conversion
CSV to Excel Converter
Turn comma-separated rows into a structured XLSX workbook with a custom worksheet name.
Workbook conversion runs locally. Your files and data are not uploaded.
How to use the CSV to Excel converter
- STEP 1Paste CSV with a header row.
- STEP 2Name the worksheet and convert.
- STEP 3Download the generated XLSX workbook.
About this tool
CSV is ideal for plain tabular exchange, while XLSX packages worksheet cells in a native Excel workbook. This converter produces a genuine workbook that opens in Excel, Numbers, LibreOffice, and compatible apps.
The first CSV row becomes the worksheet header.
Because generation is local, confidential rows never leave the browser.
Frequently asked questions
Does this create a real Excel file?
Yes. The download is an Office Open XML .xlsx workbook, not a CSV file renamed with an Excel extension.
Are quoted CSV fields supported?
Yes. Standard CSV quoting, embedded commas, and line breaks are parsed by the workbook library.
Is my CSV uploaded?
No. The workbook is generated locally in your browser.