Does the resulting file support multiple sheets?

The conversion produces a single-sheet workbook from your CSV data, matching what a CSV file itself contains.

Will number formatting (like currency or dates) be applied automatically?

Values convert as plain numbers or text based on their content — specific formatting like currency symbols would need to be applied afterward in Excel.

Is the output a real .xlsx file, not just a renamed CSV?

Yes, it's a genuine Excel workbook file, not simply a CSV with a different extension.

Does CSV to Excel upload my files to a server?

No. CSV to Excel runs entirely in your browser using on-device processing, your files never leave your device.

CSV to Excel

Convert a CSV file into a downloadable Excel (.xlsx) spreadsheet.

Runs in your browser

Drop a CSV file here

Choose File

About this tool

A CSV file opens in Excel just fine, but it isn't actually an Excel file — it has no formatting, no multiple sheets, and some systems handle the distinction inconsistently when a genuine .xlsx is specifically expected. This tool converts a CSV file into a proper Excel workbook, giving you a real .xlsx file when that's specifically what's needed rather than a CSV that merely opens in Excel.

Frequently asked questions

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