CSV to Excel, Online

Skip Microsoft Office entirely. Plotiq builds a real .xlsx workbook in the browser — typed cells, bold header, proper encoding, ready to open in any spreadsheet app.

Handy when Office isn't installed or an upload is off-limits.

1. Open the tool in your browser

No Microsoft 365, no desktop install, no extensions. Works on every OS.

2. Paste your CSV

Drop a file or paste CSV text. Plotiq builds the OOXML workbook locally — no cloud round-trip.

3. Download the Excel workbook

Real .xlsx file with typed cells and a bold header — opens in Excel, Google Sheets, Numbers, or LibreOffice.

Do I need Microsoft 365 for the online CSV to Excel tool?

No. The tool doesn't use Microsoft's services — it reconstructs the OOXML spec client-side.

Does this online tool support .xlsm with macros?

No. Output is plain .xlsx (values + styles) — macros are out of scope for a CSV source.

Can I preview cell types before downloading the .xlsx?

Yes. The preview pane shows how each column will be typed (number, date, boolean, text) before you hit download.

Does the online tool keep my CSV private?

Yes. Everything happens in the browser — no CSV bytes reach our servers.