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XLSX to CSV Converter
Convert XLSX files to CSV in seconds, free and unlimited.
🔒 Files are processed on your device. Nothing is uploaded.
How to convert XLSX to CSV
- Click Choose files or drop your XLSX files into the box. You can add several at once.
- Make sure CSV is selected as the output format.
- Press Convert, then download your CSV files.
XLSX
Microsoft Excel workbook, the default spreadsheet format since Office 2007.
CSV
Comma-separated values: plain-text tables accepted by every spreadsheet and database.
Spreadsheets are converted with SheetJS. Formulas are kept as their calculated values; formats with a single table (CSV, HTML) export the first sheet.
Other XLSX conversions
Convert other files to CSV
FAQ
Is converting XLSX to CSV free?
Yes. Unlimited conversions, no sign-up, no watermark.
Are my files uploaded to a server?
No. FieldConvert processes files inside your browser, so your XLSX files never leave your device. That makes it private and fast, because there is no upload or download wait.
Is there a file size limit?
Only your device's memory. Files up to about 2 GB work in most desktop browsers.