This article describes the different formats that use the CAP file extension and how to open each type.
How to Open and Use a CAB File in Windows
Some packet sniffing programs save packet capture files with the .cap file extension. It contains raw data collected by the program so that it can be analyzed later or with another program.
Other CAP files may be project files for DirectX games created with the Construct game editing software. They may contain sounds, graphics, models, and other things used by the game.
This extension is also related to ASUS motherboards as the file used when updating BIOS. It is also related to a subtitle/caption file format that stores text intended to be played along with a video; this type of file is used by some broadcasting companies and may be called a Videotron Lambda file.
