XLSX (EXCEL) to XLS (EXCEL) Converter
Convert your xlsx files to xls online & free
Office Open XML Worksheet Sheet
Microsoft Excel Worksheet Sheet (97-2003)
How to convert XLSX to XLS
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose "to xls"
Choose xls or any other format you need as a result (more than 200 formats supported)
Download your xls
Let the file convert and you can download your xls file right afterwards