Can I convert all sheets in a workbook at once?

Yes. Multi-sheet workbooks produce a separate CSV file per sheet, delivered as a ZIP archive.

Are Excel formulas preserved?

No. CSV is a plain text format. Formulas are replaced with their calculated values.

Comma by default. You can choose semicolon or tab delimiter in the options panel.

UTF-8 with BOM for maximum compatibility with Excel.

5MB on free, 50MB on Pro, 200MB on Business.

SPREADSHEET

Convert XLSX or XLS spreadsheets to CSV instantly in your browser. Handles multiple sheets — no upload, no account needed.

Files never uploadedInstant conversionNo account needed

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