Charles is an HTTP proxy/HTTP monitor/Reverse Proxy that enables a developer to view all of the HTTP and SSL/HTTPS traffic between their machine and the Internet. This includes requests, responses and the HTTP headers- which contain the cookies and caching information. Features: SSL Proxying – view SSL requests and responses in plain text. Bandwidth Throttling to simulate slower Internet connections including latency. AJAX debugging – view XML and JSON requests and responses as a tree or as text. AMF – view the contents of Flash Remoting / Flex Remoting messages as a tree. Repeat requests to test back-end changes. Edit requests to test different inputs. Breakpoints to intercept and edit requests or responses.