Excel to CSV
Convert Excel XLSX, XLS, ODS, Apple Numbers, and TSV files to CSV online for free. Select sheets, preview data before downloading. 100% browser-based. No signup required.
Use Excel to CSV FreeHow to convert spreadsheets to CSV
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Upload your spreadsheet — XLSX, XLS, ODS, Apple Numbers, CSV, or TSV — by clicking the drop zone or dragging the file in
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If your workbook has multiple sheets, select the sheet you want to convert from the sheet selector dropdown
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Review the data preview to confirm columns and values are correct, then click Download CSV to save your file
Frequently Asked Questions
How do I convert an Excel file to CSV online for free?
Upload your XLSX, XLS, ODS, Apple Numbers, CSV, or TSV file. If the workbook has multiple sheets, select which one to convert. Review the data preview to confirm everything looks correct, then click Download CSV. The conversion runs entirely in your browser — no signup required and your spreadsheet is never uploaded to a server.
Which spreadsheet formats can I convert to CSV?
XLSX (Excel 2007+), XLS (older Excel), ODS (LibreOffice/OpenOffice), Apple Numbers (.numbers), CSV, and TSV files are all supported. The output is always a standard UTF-8 encoded CSV file compatible with Excel, Google Sheets, databases, and data processing tools.
What happens to Excel formulas when converting to CSV?
Formulas are resolved to their computed values in the CSV output. The formula itself is not included — only the result. For example, a cell containing =SUM(A1:A10) will appear as the numeric result, such as 42, in the downloaded CSV file.
Can I convert a specific sheet from a multi-sheet Excel workbook?
Yes. After uploading, a sheet selector appears if your workbook has more than one sheet. Choose the sheet you want and the preview updates to show that sheet's data. Only the selected sheet is included in the downloaded CSV — other sheets are not exported.
Is it safe to convert confidential spreadsheets to CSV in the browser?
Yes. All processing runs entirely in your browser — your spreadsheet file is never sent to any server. Financial data, personal records, or sensitive business information stays on your device throughout the entire conversion. No data is stored, logged, or transmitted.