.WP3 File Extension
File TypeMicrosoft Photo Story Project File
This file is saved in a binary format, which requires a specific program to read its contents.
What is a WP3 file?
Project file created by Photo Story, a program used for creating digital slideshows; contains pictures, effects, captions, audio, and playback settings; used to compile personal photos together for playback in desktop and mobile device video players.
WP3 files may be exported to .WMV files in Photo Story.