The aim of this thesis is to redesign an interactive system “Arngren website” (https://arngren.net/), based on usability evaluation. Survey is used to perform the evaluation of the website to identify the usability problems. Based on the results obtained in the evaluation process, better suggestions are given to redesigning the interactive system’s user interface by applying Human-Computer Interaction (HCI) design principles. Prototyping method is used to redesign the interactive system. After redesigning the existing website, it is also subjected to the survey and results are presented in the report.