Local processing

CSV to XLSX Converter

Convert CSV rows to a simple XLSX spreadsheet locally in your browser.

From To

Select document Drop a file here or choose one from your device. Choose a file

Spreadsheets convert locally on this device, ideal for quick table cleanup and export.

Select a document before converting.

Related converters

CSV TSV Convert CSV files to TSV locally in your browser. CSV JSON Convert CSV files to JSON locally in your browser. CSV TXT Convert CSV files to TXT locally in your browser. CSV HTML Convert CSV files to HTML locally in your browser.

Questions

Are CSV files uploaded during conversion?

No. Spreadsheet conversion runs locally in this browser, so the selected file stays on your device.

Will formulas, multiple sheets, and cell styles be preserved?

No. The converter reads the first worksheet as data and outputs a clean data file. Complex formulas, styling, and workbook structure are not preserved.