This thesis shows the work undertaken for supporting user interface migration of web applications. Interface migration occurs when a user interacting with an application switches to a different device and the application interface is transferred onto the new device. Migration must be supported by a platform aware system able to perform interface adaptation that keeps into account the different features of the devices involved, in order to keep the interface usability. Beside adaptation, continuity is the main matter. Once the interface migrates onto a new device, the interaction can be continued without having to restart the application from the beginning. Different types of migration can occur and supporting them poses different level of difficulty. This thesis analyses the various types of migration and describes the client-server architecture implemented for supporting all of them. The thesis shows how the migration service evolved starting from a first core of basic functionalities supporting the easiest situation to the most challenging one
