Chat is process of communication in which we can use interacting and exchanging messages over the Internet via unique id. Chat is also known as chatting called online chat. In internet Chat we can use text, verbal, audio, visual or audio-visual communication via the Internet. For chatting we must install chat software that supports Internet Relay Chat (IRC) or an instant messenger application also known as Medium of Chat where a central server manages Chat communication between different end user clients. In online Chat services must be require users to sign up with a valid email address. After signing up a user may join a group Chat room or send a private message to another individual. Online Chat services have purpose-built Chat interfaces that manage the entire communication processes.