Is this tool really free?

Yes, 100% free with no limits, no signup, and no watermarks.

Does my file get uploaded to a server?

No. Everything runs locally in your browser — your file never leaves your device.

Rows and columns are mapped directly from your CSV into an XLSX spreadsheet with the same data.

CSV to Excel runs entirely in your browser. Enable JavaScript to use the interactive tool — your files are processed locally and never uploaded.

CSV to Excel converts standard CSV text files into formatted Microsoft Excel (.xlsx) spreadsheets.

Yes, 100% free with no limits, no signup, and no watermarks.
No. Everything runs locally in your browser — your file never leaves your device.
Rows and columns are mapped directly from your CSV into an XLSX spreadsheet with the same data.