CSV to Excel Converter
Paste or import CSV data and download a real Excel (.xlsx) file — private and in your browser.
Convert CSV to a real Excel file
The CSV to Excel converter turns CSV data into a genuine Excel (.xlsx) workbook — not just a renamed text file. Paste your CSV and download a properly formatted spreadsheet that opens cleanly in Excel, Google Sheets, and LibreOffice. It runs entirely in your browser, so your data is never uploaded.
Why proper conversion matters
Opening a CSV directly in Excel often causes headaches: numbers stored as text, leading zeros stripped, dates misinterpreted, and columns not splitting correctly. Converting to a true .xlsx file produces a real worksheet with cells in the right columns, ready to use — avoiding the manual "Text to Columns" cleanup CSVs usually require.
How to use it
- Paste your CSV data into the box (the first row can be headers).
- Click Download .xlsx.
- Open the file in Excel or any spreadsheet app.
CSV vs XLSX
| Format | Best for |
|---|---|
| CSV | Data exchange, imports, code |
| XLSX | Editing, formatting, formulas, multiple sheets |
Handling quoted fields
The converter correctly parses quoted CSV fields, so values containing commas, quotes, or line breaks are placed into single cells rather than being split apart. This matters for real-world data like addresses and descriptions, where naive splitting on commas would scramble your columns.
Private by design
Your CSV is converted locally in your browser using a spreadsheet engine loaded on demand. Nothing is uploaded, so the tool is safe for sensitive or proprietary data, and there's no upload wait — the Excel file is generated instantly.
Private and free
The converter is completely free with no sign-up. Convert as much CSV data as you like.
Frequently asked questions
Is this a real Excel file?
Yes. It produces a genuine .xlsx workbook with proper cells, not a renamed CSV.
Does it handle commas inside fields?
Yes. Quoted fields are parsed correctly, so commas and quotes inside values stay in one cell.
Is my data uploaded?
No. Conversion runs entirely in your browser and nothing leaves your device.
Is it free?
Yes, completely free with no sign-up.