Driven by technological progress digitalization of society is speeding up. This changes how we communicate. Spatial planning has to face this fact and deal with this development. The work at hand is concerned with e-participation, an internet based system for modern public participation. The first part of this work depicts basics and frameworks, which allow to identify the characteristics of e-participation. This acts as a basis, to derive the strengths and weaknesses of e-participation in general and in comparison to conventional on-site participation. In the second part of this thesis, a criteria grid is developed, to analyze the practical implementation of the theoretical findings on selected e-participation projects with reference to spatial planning. Results show that e-participation is a suitable method for future and modern participation in spatial planning. Especially place and time independence of internet based participation processes lead to higher coverage of and improved accessibility by persons, in comparison to conventional on-site participation. However, results of this analysis also show, that the success of e-participation is heavily dependent on implementation and format, accessibility, transparency and support of internet based offers. Furthermore, it becomes evident, that personal contact should also be available for internet based procedures, to ensure accessibility of offers for each and everyone.