WinDbg is a powerful debugging tool developed by Microsoft, primarily used for analyzing and troubleshooting software applications and system crashes. It allows developers and system administrators to examine the state of a program or operating system at a specific point in time, making it easier to identify and fix issues. This tool supports various debugging scenarios, including user-mode and kernel-mode debugging. WinDbg can analyze crash dumps, monitor system performance, and provide insights into the behavior of applications, making it an essential resource for anyone involved in software development or system maintenance.