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HomeConvertConvert to XLS

Convert to XLS

Convert any file to Microsoft Excel 97-2003 format — free, fast, and private

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About XLS Format

Microsoft Excel 97-2003 (.xls)

Microsoft Excel 97-2003 (.xls) is a spreadsheet file format.

Convert to XLS from any format

Choose a source format below to convert to Microsoft Excel 97-2003

XLSXXLSODSXLSCSVXLSTSVXLSNUMBERSXLSXLSMXLSXLSBXLS

Frequently Asked Questions

How do I convert files to XLS?
Simply upload your file using the converter above, select XLS as the output format, and click convert. The conversion happens instantly in your browser — no uploads needed.
What file formats can be converted to XLS?
You can convert 7+ formats to XLS, including XLSX, ODS, CSV, TSV, NUMBERS and more. Browse the full list of supported source formats above.
Is converting to XLS free?
Yes, Convert999 is 100% free with no limits. Convert as many files to XLS as you need — no registration, no watermarks, no hidden fees.
Is my data safe when converting to XLS?
Absolutely. All conversions happen locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

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About Microsoft Excel 97-2003

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