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Convert XLS to XLSX

Convert xls files to xlsx online in seconds while preserving quality, formatting, and compatibility—no software required.
Drop your XLS file here or click to upload
Only .XLS files are accepted
Convert XLS to XLSX with our fast and secure online file converter. Easily transform xls files into xlsx while maintaining the best possible quality and formatting. Whether you're improving compatibility, sharing files, or preparing documents for editing, our converter delivers reliable, high-quality results in just a few clicks.

Convert From xls

Choose a target format to convert to.

Convert To xlsx

Choose a source format to convert from.
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