CSV to Excel (XLSX) Converter
Convert CSV into a real .xlsx Excel file and download it
Convert comma- or tab-separated CSV data into a genuine .xlsx file you can open directly in Excel. Numbers are automatically recognized as numeric cells, so you can calculate and sort right away in Excel.
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Drag and drop a CSV file or paste the text.
- Check the delimiter, file name, and automatic number-conversion options.
- Click 'Convert to Excel (XLSX)'.
- Download the generated .xlsx file.
FAQ
- Is my file sent to a server?
- No. The CSV is converted to an .xlsx file entirely within your browser and is never sent to a server.
- Does it work with tab- or semicolon-separated files?
- Yes. In the delimiter setting, choose the one that matches your data—comma, tab, semicolon, or pipe.
- Do leading zeros, like in ZIP codes, get dropped?
- No. Values with a leading zero are kept as text so the zero isn't lost. Only ordinary numbers are converted into numeric cells.