XLSX / CSV Converter
Convert between Excel (XLSX) and CSV formats instantly
Drop an .xlsx file here or click to browse
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How to Use XLSX / CSV Converter
- Choose a conversion direction: XLSX to CSV or CSV to XLSX
- Upload your file or paste CSV text in the input area
- Preview the converted data in the table below
- Click Download to save the converted file
Frequently Asked Questions
Is my data sent to a server?
No. All conversion happens locally in your browser using JavaScript. Your files never leave your device.
Are multiple sheets supported?
When converting XLSX to CSV, you can select which sheet to convert. CSV to XLSX creates a single sheet.
What is the file size limit?
There is no hard limit, but very large files (over 50MB) may be slow to process in the browser.