Convert CSV to Excel (XLSX)

Convert CSV to Excel online and turn raw CSV data into a proper .xlsx workbook in seconds. Just paste your CSV text or upload a .csv file, click Convert, and download a ready-to-open spreadsheet for Microsoft Excel, Google Sheets or LibreOffice Calc. This free CSV to XLSX converter runs 100% in your browser, so your data is processed locally and never uploaded to any server. It is a fast, private way to change comma-separated values into a clean Excel file without installing software or signing up.

🔒 100% private — files never leave your device

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How to use

  1. Paste your CSV text into the box, or upload a .csv file.
  2. Click Convert to XLSX to build the Excel workbook.
  3. Review the status message confirming the conversion finished.
  4. Download the converted .xlsx file to your device.

Frequently asked questions

Does my CSV get uploaded to a server?

No. The entire CSV to Excel conversion happens in your browser using local JavaScript. Your data never leaves your device and nothing is uploaded.

What input does this converter accept?

You can paste CSV text directly, or upload a single .csv file. The content is read as plain text and converted into an .xlsx workbook.

Which delimiters and CSV formats are supported?

Standard comma-separated values work best. The parser also handles quoted fields that contain commas, quotes or line breaks, following the usual CSV rules.

Can I open the result in Excel or Google Sheets?

Yes. The output is a real .xlsx workbook that opens in Microsoft Excel, Google Sheets, LibreOffice Calc and other spreadsheet apps.

Is there a file size or row limit?

There is no fixed limit. Because everything runs in your browser, very large CSV files depend on your device's available memory, but typical spreadsheets convert quickly.

Will my numbers, dates and columns stay intact?

Your rows and columns are placed into a single worksheet exactly as parsed from the CSV. Values are kept as read, so the layout of your data is preserved.

About this tool

Free CSV to Excel converter that turns pasted or uploaded CSV into a clean .xlsx workbook. Runs 100% in your browser — fast, private, and nothing is uploaded.

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