In this paper we present WebPS, an open-source web-enabled simulator for P systems, and a P accelerator for parallelization of the existing sequential simulators. The simulator is based on CLIPS, and it is already available as a web application. The P accelerator is used to parallelize the existing sequential simulators of the P systems. We exemplify this tool by using a simple CLIPS simulator. The speedup and the efficiency of the resulting parallel implementation are surprisingly close to the ideal ones. Combining these two ingredients, we get a complex and ready-to-use parallel simulator for P systems; no installation are required, no previous knowledge of operating systems, parallel programming or specific software.