Watch the intro video: https://youtu.be/jeZyOjZKxYc
Main page: https://reactuibuilder.com
The tool is fairly simple, just open the editor in the browser and design your component. Then generate the code and save it into your project.
Here is the editor for the Material UI library components: https://editor.reactuibuilder.com/?appDemo=https%3A%2F%2Fwcd-material-ui.web.app
1. Go to online editor
2. Create a page (left side menu)
3. Compose your component (use simple materialUI components)
4. "Save"
5. Click "Generate Code" That's it!