To install JRebel on IntelliJ, start by clicking the gear icon in the top-right corner of the IDE and selecting Plugins. From there, navigate to the Marketplace tab. In the search bar, type JRebel, and once it appears in the results, click Install. After the installation finishes, IntelliJ will prompt you to restart the IDE—go ahead and restart to complete the setup. That’s it! JRebel will now be available in your development environment.