XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save workbooks, but can also use the XLS format.

XLS files are spreadsheet files created by Microsoft Office Excel. An Excel spreadsheet can contain anything from images and plain text to graphs and tables and can be opened using Excel. If a ...

Hamza is a certified Technical Support Engineer. The ‘Excel Cannot Open the File’ error usually occurs when attempting to open an older Excel file with a newer ...

A file’s format and extension not matching means the file was saved in a different format than its extension. Problems can occur when trying to open the file if the program doesn’t recognize the ...