Alibaba Cloud Toolkit is an integrated development environment (IDE) plug-in that Alibaba Cloud provides for developers to develop and deploy cloud applications in an efficient way. This plug-in is short for Cloud Toolkit. After you develop, debug, and test your application in your on-premises environment, you can install Alibaba Cloud Toolkit in an IDE, such as IntelliJ IDEA or Eclipse. This way, you can connect to a cloud environment and deploy your application to the cloud by using a graphical user interface (GUI).