1
Upload XLSX2
Review File3
Convert to XLS4
Download XLS1
Upload XLSXChoose the XLSX file you want to convert.
2
Review File
3
Convert to XLS
4
Download XLS
spreadsheet Converter• 100% Client-Side
XLSX to XLS Converter
Export modern Excel workbooks into legacy binary XLS format.
xlsx→xls
Drop XLSX file(s) here, or browse
Supports single or multiple batch conversion
Private by Design
Your files are processed directly on your device using WebAssembly, HTML5 Canvas, and client-side runtimes.
No server upload No cloud copy 100% local processing
How To Convert
How to Convert XLSX to XLS
Step 1
Upload XLSX
Choose the XLSX file you want to convert.
Step 2
Review File
Check the file information and conversion options.
Step 3
Convert to XLS
Start the local XLSX to XLS conversion.
Step 4
Download XLS
Download your converted XLS file.
Frequently Asked Questions
Questions about XLSX to XLS Conversion
Can legacy machines open this file?
Yes, it works with Excel 97 through 2003 and modern viewers.
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