Convert CSV files to Microsoft Excel (.xlsx)

Instantly convert CSV files and plain delimited data into formatted Microsoft Excel workbooks with automatic table headers and data type detection.

How to Convert CSV files to Microsoft Excel (.xlsx)

  1. Step 1. Upload your CSV file or drag and drop it into the dropzone.
  2. Step 2. Preview your formatted table rows in the live grid.
  3. Step 3. Click Download to save your formatted .xlsx Excel workbook.

Frequently asked questions

Does it support special characters and UTF-8?

Yes, full UTF-8 encoding is supported, preserving accented characters and international symbols.

Is my CSV file uploaded to a server?

No. The conversion runs entirely in your browser with SheetJS, so the file is read locally and the .xlsx workbook is generated on your device.

How is the header row handled?

The first row of your CSV becomes the first row of the worksheet, so your column names carry over as the header row of the Excel table.

What output file do I get?

A single .xlsx workbook named after your CSV file, ready to open in Excel, Google Sheets, or LibreOffice.