📊 Spreadsheet Converters

2 free online converters

Convert CSV data to Excel format or extract spreadsheet data to universal CSV. Perfect for data analysis, database imports, and cross-platform compatibility.

CSV → XLSX

Convert CSV spreadsheets to Excel XLSX format instantly. Free, fast, no signup. Max 50 MB.

XLSX → CSV

Convert Excel XLSX spreadsheets to CSV format instantly. Free, fast, no signup. Max 50 MB.

Frequently Asked Questions

Will my data be preserved?

Yes. All text, numbers, and structure are preserved. Formulas are converted to their calculated values.

Can I convert very large spreadsheets?

Files up to 50 MB are supported. Very large files may take longer to process.

Is my data uploaded?

No. All conversions happen in your browser. Your data never leaves your device.