.CAP File Extension 5 file types use the .cap file extension. 1.Packet Capture File 2.ASUS BIOS Update File 3.Construct Game Development File 4.Capella Score 5.PASCO Capstone Experiment File Packet Capture File Developer N/A Popularity 3.1 | 47 Votes What is a CAP file? A CAP file contains packets collected by a packet sniffing program. It saves raw data and metadata captured over a network transmission. CAP files are also called trace files or bone files, and they are used by multiple packet sniffer applications. More Information
