Codepen Page

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.

Rating: 4.7/5

Pro users get "Asset Hosting," which is a game-changer. You can upload images, fonts, or JSON files directly to the Pen. Plus, the built-in support for fetching from external APIs (like Unsplash or GitHub gists) makes prototyping real data effortless. codepen

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. While you can share a link, true real-time

You cannot easily import local npm modules that have complex build steps. You are stuck using ES modules from CDNs like Skypack or UNPKG, which sometimes break if the library maintainer changes the file structure. You can upload images, fonts, or JSON files