How to Open a Xlsx File
An XLSX extension is a file format used by Microsoft Excel 2007 and newer. When you create a spreadsheet in Excel and save it, your file automatically ends with this format. Vendors that communicate with you electronically may send you invoices or a cost analysis using an XLSX extension. Your contractors may also send you emailed quotations or shipping orders in this format. You may open the files using standalone software, or with a Web application.
Launch Microsoft Excel. Click “Start,” “All Programs” and “Microsoft Office.”
Choose “Microsoft Excel” so that the program will start. A new spreadsheet will open.
Go to the ribbon and click the “File” tab. Select “Open” from the menu so that a dialog window appears. Select “My Computer” on the left, browse to find your XLSX file, then click “Open” so that it will load inside the program
Launch the OpenOffice spreadsheet. Click “Start,” “All Programs” and “OpenOffice.org”
Choose “OpenOffice.org Calc” so that the program will start. A new spreadsheet will open.
Go to the top menu and click “File” then “Open.” At the window prompt, browse to find your file, then click the “Open” button so that it will load into the software.
Navigate to the Microsoft SkyDrive website, create an account and log in. If you have a Windows LiveID or Hotmail account, you may log in using your username and password instead.
Go to the menu and click “Add files.” A "File Upload" dialog window will open.
Browse to find your XLSX file, then click “Open.” Your document will load into the Excel Web application, and will be accessible to you online.