We will be using JDL Studio (https://start.jhipster.tech/jdl-studio/) to create our JDL file. It is an online web application built by the JHipster team for creating JDL files in a visual editor. The tool shows a visual representation of the created entity model and also lets you import/export JDL and capture image snapshots:
The tool also provides features such as syntax highlighting, auto-completion, error reporting, and Sublime Text-style keyboard shortcuts.
Navigate your favorite browser to https://start.jhipster.tech/jdl-studio/ to open the application.
Please note that by default this application stores the JDL in your browser's local storage. You can create an account with JHipster online if you want to save your JDL files to the cloud.