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.

If you’re working with tables, you probably encountered XLSX files before. Speaking of which, in today’s guide we’re going to show you how to open .XLSX files and view their contents. Navigate to the ...

What Is an XLSX File? XLSX file extension belongs to Microsoft Excel sheets. Microsoft Excel is used to create data files wherein it stores data in text and numerical forms in cells. There are several ...

Spreadsheets that contain complicated formulas and a lot of data can take a while to load when you open them in Excel 2007, but that's not the only reason spreadsheets can be slow to load. Microsoft ...