CSV to Excel
Convert CSV files into Excel .xlsx spreadsheets, right in your browser. Free, private, nothing uploaded.
Drop files here or click to browse
Converted on your device. Nothing is uploaded — no size limit.
Frequently asked questions
Are my files uploaded to a server?
No. Everything is processed entirely inside your browser. Your files never leave your device or get sent anywhere.
Does it keep my columns and rows?
Yes — each CSV row becomes a spreadsheet row and commas split into columns, saved as a real .xlsx you can open in Excel, Google Sheets or LibreOffice.
Is there a file size limit?
No limit imposed by us — everything runs on your device, so very large files are only limited by your browser's memory.