XLSX files were created through Microsoft Excel. Microsoft Excel is the company’s popular spreadsheet software. XLSX files allow users to save spreadsheets and graphs. Users are also able to use complex mathematical equations to analyze data. XLSX files also enable users to create unique formulas and workbooks. All the saves are possible thanks to the XLSX file extension. In addition to Microsoft Excel, XLSX files are also compatible with Open Office and Oxygen Office Professional. XLSX are appealing to users because of the simple data management and data recovery tools. XLSX files are compatible with previous XLS files and other types of files that users created on previous versions of Microsoft Excel. XLSX files are also compatible with any data stored on XML applications. There have been some user concerns about the safety of these files, because XML is essentially stored as open text. Enhanced security features when sending XLSX files have alleviated those previous safety concerns.