Convert Excel (.xlsx, .xls) files to CSV format instantly in your browser. Free, private, no server upload. Supports sheet selection and custom delimiters.
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This free online tool converts Excel spreadsheets (.xlsx, .xls) to CSV format instantly in your browser. All processing happens client-side — your files are never uploaded to any server. Supports multiple sheets, custom delimiters, and header row options.
Yes. All conversion happens entirely within your browser. No Excel files or CSV data is transmitted to any server.
We support .xlsx (Excel 2007+) and .xls (Excel 97-2003) formats.
Currently, you can select and convert one sheet at a time. We plan to add batch export in a future update.
CSV is a plain text format without formatting, formulas, or merged cells. Only the raw data values are exported.