Free CSV to XLSX Converter

Convert CSV to XLSX Online

Convert CSV files to Excel online for free. Private browser-based processing — no upload, no watermark.

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Ready to convert CSV to XLSX?

Open the document converter, upload your CSV file, select XLSX, and download instantly.

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Frequently asked questions

Can I convert CSV to XLSX for free?

Yes, Convert.AI converts documents privately in your browser at no cost.

Is my document uploaded?

No. The conversion happens locally in your browser.

What is the file size limit?

Free users can convert documents up to 50MB.