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Excel to CSV

Convert Excel spreadsheets (.xlsx, .xls) to CSV format in your browser. Choose which sheet to export from multi-sheet workbooks. Handles merged cells and special formatting. Uses SheetJS — no server upload, no signup required.

Drop your Excel file anywhere, click to browse

XLSX, XLS files

Ctrl+Vto paste a copied file

Frequently Asked Questions

Which Excel file formats are supported?▼
.xlsx (Excel 2007+) and .xls (Excel 97-2003) are both fully supported via the SheetJS library.
Can I choose which worksheet to export?▼
Yes. If the file has multiple sheets, a sheet selector appears so you can choose which one to convert to CSV.
How are merged cells handled?▼
Merged cells are expanded — the value from the merged cell is placed in the top-left cell of the merge, and the other merged cells are left empty in the CSV.
Are formulas preserved in the CSV?▼
No. CSV only stores values, not formulas. The calculated result of each formula is exported, not the formula itself.
Is the file uploaded to a server?▼
No. SheetJS processes the Excel file entirely in your browser. Your data never leaves your device.