What do you use CodePen for?

CodePen: Online Code Editor and Front End Web Developer Community.

CodePen is the best place to build, test, and discover front-end code . CodePen is a social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn and debug, and find inspiration.

CodePen is an online community for testing and showcasing user-created HTML, CSS and JavaScript code snippets . It functions as an online code editor and open-source learning environment, where developers can create code snippets, called “pens,” and test them.