We’ve created an easy-to-use, open, and transparent tool that helps researchers study how climate change affects rivers and water flow in different parts of the world. This tool, built on the eWaterCycle platform, lets you choose any river catchment from large, global datasets (CAMELS and CARAVAN) and run different hydrological models on them with just a few simple steps. You can even test how future climate scenarios might impact water systems using climate data from models like CMIP6. The whole process is set up in interactive notebooks that anyone can use, including students, without needing to build everything from scratch. In fact, we’ve already helped students run their own climate impact studies this way. We hope to show others how easy it is to use this tool and invite anyone interested to join us or collaborate.