Excel to CSV Converter — Free Online Tool
Upload any Excel .xlsx workbook and convert it to CSV format. If the workbook has multiple sheets, each is shown as a tab and downloadable as a separate CSV file. Uses ExcelJS, an actively maintained pure-browser parser.
100% client-side. No uploads. Your data never leaves your browser.
How to use Excel to CSV Converter
- Drop an Excel .xlsx file into the upload area.
- Each sheet appears as a tab.
- Click a tab to preview its CSV output.
- Download individual sheets as CSV files.
Frequently Asked Questions
What Excel formats are supported?
.xlsx (modern OOXML Excel). For .xls (legacy binary) or .ods files, open them in Excel/LibreOffice and save as .xlsx first.
How are multiple sheets handled?
Each sheet appears as a separate tab. You can view and download each sheet as its own CSV file.
Are formulas preserved?
No — the converter extracts computed cell values. Formulas are evaluated to their last-calculated result.
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