PowerPoint Viewer lets you view full-featured presentations created in PowerPoint 97 and later versions with full fidelity. This viewer also supports opening password-protected Microsoft PowerPoint presentations. You can view and print presentations, but you cannot edit them in the PowerPoint Viewer.
Supported file extension:
.ppt, .pptx, .pptm, .pot, .potx, .potm, .pps, .ppsx and .ppsm
Supported Microsoft Office programs: Microsoft PowerPoint 2010