Excel → CSV Converter
Reads .xlsx and .xls workbooks directly in your browser, lets you pick a sheet, preview it, and download it as CSV with your choice of delimiter.
Runs 100% in your browser — your files never leave your device.
Read the full guide to this tool
Notes
- Dates are converted from Excel serial numbers to ISO dates (2026-07-13) instead of raw numbers like 46215.
- Formulas are exported as their last computed value, the same thing Excel shows in the cell.
- Runs 100% in your browser — your files and data never leave your device.
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