bookmark JWS Online Allows biological systems modelling. JWS Online (Java Web Simulation) is a web server which permits to construct, modify and simulate kinetic models and also to store curated models. User can build and annotate their own model using the JWS Online simulator. Three types of analyses are available: a time simulation, steady-state analysis and metabolic-control analysis. The software is SBML compliant and can be useful for the study of cellular systems.