Static analyzers are complex pieces of software with large dependencies. They can be difficult to install, which hinders overall adoption and adds barriers to students when teaching static analysis. This work introduces Try-Mopsa: a scaled-down version of the Mopsa static analysis platform, compiled into JavaScript to run purely as a client-side application in web browsers. Try-Mopsa features a responsive interface supported by computers and smartphones alike. Try-Mopsa features all core components of Mopsa, and in particular it supports relational numerical domains. We present the interface, changes and adaptations required to have a pure JavaScript version of Mopsa. We envision Try-Mopsa to be a convenient platform for onboarding or teaching purposes.