Excel to CSV Converter - XLSX/XLS to CSV Online

Convert Excel spreadsheets (XLSX, XLS) to CSV format instantly in your browser. Select sheets, customize delimiters. No uploads, works offline.

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Options

Delimiter

Encoding

Include header row

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Security: Only process files from sources you trust. All processing happens locally in your browser.

Frequently Asked Questions

Both modern XLSX (Excel 2007+) and legacy XLS (Excel 97-2003) formats are supported.

Yes! Select which sheet to convert from multi-sheet workbooks, or download all sheets as separate CSV files.

Yes. All conversion happens in your browser using SheetJS. Your files never leave your device.

Comma (default), semicolon, tab, or pipe. Choose based on your data and target system requirements.

Yes. Formulas are evaluated and their resulting values are exported. The formula text itself is not included.

UTF-8, UTF-8 with BOM (for Excel compatibility), and ISO-8859-1 for legacy systems.

Dates are exported in their displayed format from Excel. Consider standardizing date formats before converting.

CSV is plain text, so colors, fonts, and borders are not preserved. Only the cell values are exported.

Yes. Uncheck 'Include header row' in the options to export only data rows without column headers.

Browser memory limits apply. Excel files under 50MB convert quickly; larger files may take longer.