CSV to Excel File Converter
Convert CSV to a downloadable Excel file, live preview, entirely in your browser.
| name | role | team |
|---|---|---|
| Ada | Engineer | Platform |
| Grace | Engineer | Platform |
Downloads as a classic .xls file (an HTML table Excel and Google Sheets both open directly) rather than a binary .xlsx — this avoids depending on a spreadsheet-writing library entirely, which keeps this tool free of a real, currently-unpatched vulnerability in the most common one. Runs entirely in your browser; nothing is uploaded anywhere.
What is CSV to Excel File Converter?
Paste CSV and download it as a spreadsheet file that opens directly in Excel or Google Sheets. Downloads as a classic .xls file (an HTML table with a spreadsheet MIME type, which every major spreadsheet program opens natively) rather than a binary .xlsx, specifically to avoid depending on a spreadsheet-writing library — the most common one has unpatched security advisories.
FAQ
Producing a real .xlsx file needs a binary spreadsheet-writing library, and the most widely used one (SheetJS/xlsx) currently has unpatched high-severity vulnerabilities with no fixed version published to npm. The .xls-via-HTML-table approach is a long-standing, well-supported trick that needs no such library and opens identically in Excel, Google Sheets, and Numbers.
No, the file is generated and downloaded entirely in your browser.