Students perform intensive web-based applications during their education. One of these is project-based application. In this study, the effect of web based project applications on students' attitudes towards chemistry has been investigated. 42 students attending Hacettepe University, Faculty of Education, and Department of Chemistry Education have been participated in these applications. Attitude Scale towards Chemistry has been administered before and after applications. The application has been started with displaying the chosen simulation experiments with the computer program called CCI-Project (Creative Chemistry on the Web) ETH (Eidgenossische Technische Hochschule-Zurich).