CodePen

CodePen is an online social development platform that offers an Integrated Development Environment (IDE) for building websites and web applications. It provides a collaborative coding environment where developers can create, share, and showcase their HTML, CSS, and JavaScript code snippets. CodePen is widely used by web developers, designers, and coding enthusiasts who want to experiment, learn, and collaborate on coding projects. With its intuitive interface and powerful features, CodePen has become a popular choice for developers looking to prototype, debug, and showcase their work. Whether you're a beginner or an experienced developer, CodePen offers a user-friendly platform to bring your coding ideas to life.

https://codepen.io/