In this project the Modelit Webserver Toolbox was improved by making it possible to use websockets. Websockets make it possible to have full-duplex communication between the client and the server. This means that the client as well as the server can send messages to the other, contrary to the conventional HTTP requests where the conversation is always initiated by the client. Websockets are more efficient than HTTP request because they maintain an active connection and do not require the HTTP request/response overhead for each message. This makes it suitable for realtime applications and applications with multiple clients.