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.

ChatGPT is such a versatile AI tool which every week seems to expand its features. One fairly unknown feature of ChatGPT is its ability to create a wide variety of different file formats for you using ...