According to the terms of the Microsoft Excel Viewer 2003 license agreement, the software may be installed and used to view and screen print documents created with Microsoft Office software. The software may not be used for any other purpose.
It is also possible to open excel files using certain online tools and services. The job of these online excel viewers is quite simple: they allow users to open excel spreadsheets inside the browser window, and it doesn't require users to have Microsoft Excel installed. Some of these online excel viewing tools also allow users to edit and share their files online.