Tools / File Converter / XLSX to XLS Converter

XLSX to XLS Converter

Convert XLSX files to XLS. Free and without uploading.

This tool converts XLSX files to XLS. XLSX is Microsoft Excel’s current workbook format. It holds multiple sheets, formatting and formulas.

XLS is the old binary format of Excel 97–2003; older software and some institutions still require it. All sheets, numbers and dates are carried over. Some formatting, such as cell colours, may be lost in the target format.

Conversion happens inside your browser; your files are never sent to a server.

How to use

1. Drag and drop your XLSX files, paste them, fetch one from a link, or use "Choose files".
2. The target format is preselected; you can add several files at once.
3. Press "Convert" and download the XLS files.

Frequently asked questions

Is anything lost when converting XLSX to XLS?

The content is kept; formatting the target format doesn’t support (such as colours or fonts) may be lost.

How many files can I convert at once?

There is no limit. Download the results one by one or as a ZIP.

Are my files uploaded?

No. Your XLSX files are converted to XLS inside your browser.