Free CSV to XLSX (Excel) Converter Online
Use this free CSV to XLSX converter to turn CSV into an Excel file. Fast, private, and works directly in your browser.
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What is CSV to XLSX?
CSV to XLSX converts CSV data into a downloadable Excel (.xlsx) workbook. It is useful when a recipient needs a real spreadsheet file. Conversion runs in your browser.
How to use this tool
- Paste your CSV or upload a file.
- Click Convert to XLSX.
- Download the Excel file.
Features
- Convert CSV to .xlsx
- Handles quoted fields
- Single-click download
- Browser-based (no upload)
- Works with large CSVs
This tool runs in your browser. Your files and text are not uploaded to our servers, and we do not store your input.
Frequently asked questions
Will it open in Excel and Google Sheets?+
Yes. The output is a standard .xlsx workbook.
Is my data uploaded?+
No. The Excel file is created entirely in your browser.
Does the first row become a header?+
Rows are written as-is; your first CSV row stays the first sheet row.
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