roomGPT is an online service that allows you to upload room photos and employs AI technology to generate ideal room effects. Users simply upload photos of their current rooms, and the system will generate various design effects in different styles for them to choose from. Utilizing the ControlNet machine learning model, this service can generate different variants of room designs. roomGPT offers a free and open-source version that can be locally deployed, as well as a paid SaaS service.