In this work we present the database on thermophysical properties of substances at high pressures and temperatures. The database contains experimental data, Hugoniot approximations and a number of caloric equations of state. A graphical Web‐interface allows one to search data using different criteria and represent experimental points and calculation results in various forms including graphical. There is also an opportunity to simulate typical shock‐wave experiments via the Internet using equations of state and approximations available in the database.