CSV to XLSX

Convert CSV files to Excel XLSX format

All processing happens in your browser. No data is uploaded.

Offline Ready

File Input

File Output

CSV to XLSX

Upload a CSV file and convert it to Excel XLSX format for download.

🔒All processing happens in your browser. No data is uploaded.

CSV Input

Paste CSV data here or upload a .csv file...

How to Use

Upload a CSV file or paste CSV data to convert it to Excel XLSX format. The first row is used as column headers. Numeric values are automatically detected. Click "Download XLSX" to save the converted file.