Xlsx to Xls Converter

Convert XLSX files to XLS format quickly and easily with this free online tool.

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About This Tool

This tool allows you to convert Microsoft Excel XLSX files (Open XML format) to the older XLS format (Excel 97-2003). It's perfect for compatibility with older software or systems that only support XLS files. The conversion preserves your data, sheets, and basic formatting. Simply upload your XLSX file, and download the converted XLS file instantly.

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How to Use

Click the upload area or browse to select your XLSX file.
The tool will validate the file and show its name.
Click the 'Convert to XLS' button to start the conversion.
Once processed, download your converted XLS file from the results page.

Frequently Asked Questions

Find Quick Answers

What is the difference between XLSX and XLS?

XLSX is the newer Excel format (Excel 2007+) based on Open XML, while XLS is the older binary format (Excel 97-2003). XLSX files are smaller and more secure, but some older systems only support XLS.

Does this tool preserve all formatting?

It preserves data, sheets, and basic formatting (like cell values and formulas). Complex formatting (like macros or advanced charts) might not be fully retained in the conversion.

Is there a file size limit?

The tool can handle typical Excel files, but very large files (over 50MB) might take longer to process. For best performance, keep files under 20MB.

Are my files stored on your servers?

No, files are processed temporarily during conversion and deleted immediately after. We do not store or share your data.

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