It has become increasingly common that we now use our mobile devices to visit the web. This thesis examines the central design principles a designer should strive for when it is intended to simplify the use of a website in a static and variable situation trough a mobile device. The thesis includes a literature review, interviews on two occasions and a prototype development. The first interviews identified the fundamental design principles which then became the basis for the prototype. The second interviews were conducted towards the prototype with the same individuals. It examined if the fundamental design principles simplified the use of a website trough the mobile device. A comparison of the two interviews was conducted to compile the central design principles.