CSV to Excel
Turn a CSV file into an Excel spreadsheet with real numbers and a bold header row. Accents and separators are handled for you, and the file never leaves your device.
Runs in your browser. Your files are never uploaded or stored.
Something not working, or missing an option?
How to use CSV to Excel
- Choose or drop a .csv or .txt file.
- Check the separator and options.
- Select Convert to Excel to download the .xlsx.
Questions
Will it break numbers like phone numbers or IDs?
No. Numbers with leading zeros and long IDs stay as text; only ordinary numbers become numbers you can sum.
Are my files uploaded?
No. The tool runs inside your browser, and the page is blocked from sending data anywhere. You can check by turning off your internet connection: it keeps working.
Open-source parts
- write-excel-file MIT