Tiny Toolkit

Excel to CSV Converter

Convert Excel spreadsheets (.xlsx, .xls) to CSV with sheet selection and instant preview.

All processing happens in your browser. No data is sent to any server.

Frequently Asked Questions

Which file formats are supported?
The tool accepts .xlsx (Excel 2007+), .xls (older Excel), and .ods (OpenDocument Spreadsheet) files.
Can I convert a specific sheet from a multi-sheet workbook?
Yes. After uploading, a dropdown lists all sheet names in the workbook. Select the sheet you want and the CSV output updates automatically.
How are cells with commas or quotes handled in the CSV output?
The SheetJS library wraps cells containing commas, double quotes, or newlines in double quotes and escapes any internal quotes as doubled double-quote characters, following standard RFC 4180 CSV formatting.
Is my spreadsheet data sent to a server?
No. The conversion runs entirely in your browser using the SheetJS library. Your file never leaves your device.

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