🔄 CSV Converter

Convert CSV to Excel and Excel to CSV right in your browser

✅ No signup ✅ Free forever ✅ No data upload 日本語
CSV → Excel
Excel → CSV
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Drop a CSV file

or click to select one

✅ Conversion complete!

📥 Download Excel file
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Drop an Excel file

or click to select one (.xlsx, .xls)

✅ Conversion complete!

📥 Download CSV file
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Safe and private

Files are processed in your browser and never sent to a server, so sensitive data stays safe.

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Fast conversion

Even large files convert in seconds. Nothing to install, ready the moment you open the page.

🆓

Completely free

No signup or login. Every feature is free and unlimited.

Three simple steps

1
Upload your file
Drag and drop the CSV or Excel file you want to convert.
2
Choose your options
Adjust the encoding and header settings as needed.
3
Download
Download the converted file and you are done.

FAQ

Q. What if my CSV file shows garbled text?
A. Try changing the encoding setting. If "Auto-detect" does not work, select Shift_JIS or UTF-8 explicitly.
Q. Which file formats are supported?
A. CSV (.csv) and Excel (.xlsx, .xls).
Q. Where are my files sent?
A. Nowhere. Files are processed only inside your browser and are never transmitted to our servers, so your privacy stays fully protected.
Q. Can I convert large files?
A. Yes, as long as they fit within your browser's memory. Typical business data converts without any trouble.