Abstract: A method, computer program and data processing system for customizing the visualization of a Web page on a client side of a Web application operating on a computer, the server side of the Web application being responsible for receiving parameters entered by a user on the client side, processing them and sending back a new Web page wherein, if at least one visualization parameter is received among the parameters, it is reapplied in the new Web page. The method comprises the steps of storing the customization parameters entered by a user on a currently displayed Web page on the client side and locally applying them on the Web page. When a page form is sent with parameters entered by the user and which are relevant for the Web application, adding the stored current customization parameters with the other parameters. The new Web page generated by the server side of the Web page application and sent to the client side will contain the visualization customization parameters entered by the user.