Xk72 is a software development company known for creating Charles, a popular web debugging proxy application detailed on their website http://charlesproxy.com. Charles allows developers to view all of the HTTP and SSL/HTTPS traffic between their machine and the internet. This includes requests, responses, and HTTP headers, which contain crucial cookies and caching information. By facilitating easy access to this traffic, Charles is an invaluable tool for developers to debug their web applications, optimize performance, and monitor network calls. The tool is particularly useful for those developing for mobile devices, enabling them to view traffic directly from mobile applications. Xk72 focuses on providing robust, user-friendly software solutions that enhance productivity and streamline development workflows.