What is a Default XLSX File Name?
Workbook1.xlsx - The default Microsoft Excel file name gives new binders starting with Excel 2007.
How to Open XLSX File?
You can open XLSX files with Microsoft Excel in Windows and in macOS. Excel is the best option for opening XLSX files because it fully supports the formatting of Excel spreadsheets, which includes images, graphs, and spacing of data fields.
Excel is also available for Android and iOS devices.There are a large number of other spreadsheet programs that can open and edit XLSX files but they may not fully support the formatting of the original spreadsheets.
Alternative programs include Corel Quattro Pro (Windows), Apple Numbers (Mac), and OpenOffice Calc (multiplatform).
You can also open XLSX files with various web programs. Google Sheets is a great free option that allows you to upload an XLSX file and view, edit, save, and convert the spreadsheet.