Your computer is home to countless files, and not all of them look or even function the same. Youve got your standard .doc files for Word documents, .jpg and .png files for pictures, and .mp4 files for videos. When your computer encounters the dreaded Blue Screen of Death (or BSOD), it creates a .dmp file, which is made to help you diagnose the situation. The .dmp extension refers to “dump”, and it’s a memory dump file that contains information about what’s happening to running processes on your computer.