The present disclosure generally describes computer-implemented methods, program products, and systems for providing an integrated visual code editor that generates code snippets based on input received through the graphical user interface and simultaneously displaying the generated code snippets along with a real-time preview of the runtime behavior of the code snippet through a graphical user interface. The method and system includes a novel graphical user interface of the visual code editor that is connected to a repository and can retrieve information for concurrently display to a developer of the application. The visual code editor may concurrently display a code snippet in particular area of the graphical user interface and the runtime behavior of the code snippet within another area of the graphical user interface.