Codepen Today

While you can share a link, true real-time collaborative editing (like Google Docs or Figma) doesn't exist without third-party hacks. You end up passing links back and forth.

You don't need to set up a local dev environment. Need SCSS? Pug? TypeScript? Markdown? Just click a button. It handles JSX for React and Vue single-file components seamlessly. codepen

The split-screen experience is perfect. The "Live View" updates instantly as you type (debounced, of course), and the "Debug" mode strips away the Pen UI to show exactly what your code looks like in a raw browser window. While you can share a link, true real-time