Analyzing fluid flow through a nozzle involves evaluating flow regime type and criteria, determining the existence and location of shockwaves or expansion fans and their associated geometry, and solving multistep procedures to acquire desired fluid state properties throughout the nozzle and in the nozzle flow structure that can exist downstream of the nozzle exit. The calculations necessary for these evaluations are derived from traditional gas dynamic modeling and require iterative solvers or the use of lookup tables to quantify each desired state or geometric value. Internet based software was designed and built to analyze nozzle flow and flow structure quickly and easily, while also graphically displaying nozzle flow structure for visual learning. This software is available through an online resource called TEST that provides many similar thermofluid based tools, which access gateways to thermodynamic databases for system evaluation while providing a graphical representation of the system being analyzed. By combining a software language with a internet based graphical user interface, both academic and commercial users can benefit from software packaged in this form. These benefits stem from the reduced computational time and a visually rich, graphical representation of the flow structure being analyzed.