What is the difference between Node.js and Next.js?

Next.js is an open source development framework that enables functions in React based web applications such as server side rendering and static website generation. Traditional React applications display all content in the client-side browser, and Next.js is used to extend this feature to server-side displayed applications. Next.js is a responsive server-side framework with several advantages. However, its main selling point is that it is server-side responsive.