What is a .XL file?
Alternative extension used for Excel spreadsheet files; contains data organized in rows and columns; can be exported from Excel as a text file, .CSV, or .TSV file.
More .XL File Extension Information
Excel files typically use the .XLS file extension.
How to open .XL files?
.XL can be using by 2 Flatform (Mac, Windows).
And can be open by bellow programs list:
Updated at: 2018-11-13