CSV to Excel Converter
Paste CSV data or upload a .csv file and download a real .xlsx Excel spreadsheet — generated entirely in your browser.
CSV Input
Frequently Asked Questions
Does this create a real .xlsx file?
Yes. This tool generates a valid Open XML (.xlsx) file that opens correctly in Microsoft Excel, Google Sheets, LibreOffice Calc, and all major spreadsheet apps.
Is my data sent to a server?
No. The .xlsx file is generated entirely in your browser. Your data never leaves your device.
What delimiters are supported?
Comma (,), semicolon (;), tab, and pipe (|). The tool also auto-detects the delimiter if you leave it set to Auto.
Can I add a header row?
The first row of your CSV is treated as a header row and formatted in bold in the Excel output.