International Journal of Web Applications Gjorgi Peev, Nikola Simidjievski, Sašo Dzeroski 11 1 2019 http://www.dline.info/ijwa/fulltext/v11n1/ijwav11n1_3.pdf Process-based modeling (PBM) is an equation discovery approach for automated modeling of dynamical systems, which takes at input substantial expert knowledge and measured data of the observed system. The resulting processbased models offer both high-level representation (in terms of building blocks / model components, i.e., entities and processes) and low-level representation (a set of ordinary differential equations). ProBMoT, a software platform for modeling, parameter estimation, and simulation of process-based models, is the latest implementation of the process-based modeling approach. While ProBMoT has been successfully applied to the task of modeling dynamical systems, compared to other modeling and simulation software, it is substantially behind in terms of user-friendliness. The goal of the present work is to overcome this limitation of ProBMoT. We design and implement an extension of ProBMoT, named ProBMoTViz, which is a platform consisting of a GUI (Graphical User Interface) for ProBMoT and a PBM Visualizer for process based models. We evaluate the versatility of ProBMoTViz on example case studies.