Add to ORKGOver the last decades, the Internet has seen enormous growth. The use of online services in everyday life for all kinds of activities is increasing. In most cases, companies are collecting data to provide and improve their online services. However, many users are often unaware of the scale and nature of the data collected and stored during use. This thesis is devoted to the question of how average Internet users can be helped to gain insight into their collected data and thus develop a more aware behavior. The goal of the developed application is to improve the transparency of the collected data. To achieve this, an overview was obtained of how data is currently collected on the Internet. Based on this overview, the personal data of online ...