Analysis of nonlinear systems is a very complex and hard process, when it is performed manually. In this study, the analysis of nonlinear systems with a web based interface which can be used over internet is aimed. The interface has been designed based on Volterra series method which performs frequency analysis of nonlinear systems. MATLAB Web Figure and ASP.NET platform have been used to implement the interface. Thus, an application which provides to use the method commonly and enables to realize the educational and academic purposes has been created.