Upgrade to XLSX for smaller file sizes, enhanced security, modern collaboration features, and to prevent accidental data loss ...

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.

Tracking, organizing, and displaying data is crucial for business, finances, and personal goals. Microsoft Excel has been the go-to application for decades with its straightforward user interface and ...