CodeSandbox
The collaborative cloud development platform for rapid full-stack prototyping and ephemeral environments.
The premier social development environment for front-end designers and developers.
CodePen stands in 2026 as the definitive standard for front-end prototyping and social coding. Following its 'CodePen 2.0' overhaul, the platform has migrated its core editor to a high-performance engine powered by VS Code's Monaco editor, offering a seamless transition for desktop developers. It functions as both a sandboxed Integrated Development Environment (IDE) and a social media network for web professionals. Architecturally, CodePen provides an abstracted build pipeline, allowing developers to utilize preprocessors like Sass, Less, and Stylus, or transpilers like Babel and TypeScript, without local environment configuration. Its market position is solidified by its 'Project' architecture, which enables multi-file structures, asset hosting, and server-side rendering simulations, bridging the gap between a simple 'Pen' and a full-scale web application. For 2026, its focus remains on high-fidelity performance for complex JavaScript frameworks and an enhanced design-to-code workflow that integrates deeply with modern design systems. It is the industry's go-to for embedding live, editable code snippets within documentation, educational materials, and professional portfolios.
Allows a Pro user to broadcast their editor to a group of students who can watch the code change in real-time without editing.
The collaborative cloud development platform for rapid full-stack prototyping and ephemeral environments.
Transform natural language prompts into production-ready full-stack applications autonomously.
The first fully containerized cloud IDE for professional developers and distributed teams.
The collaborative, instant-deployment platform for building and hosting modern web applications.
Verified feedback from the global deployment network.
Post queries, share implementation strategies, and help other users.
Real-time multi-cursor editing environment similar to Google Docs but for web code.
A full-scale IDE in the browser supporting directory structures, local file referencing, and build tools.
Drag-and-drop cloud storage for images, scripts, and CSS files with built-in CDN delivery.
Full support for Emmet abbreviation expansion within the HTML and CSS editors.
Full-page preview that updates in real-time on any device with a shared URL.
A view mode that strips away the CodePen interface and iframe wrappers to reveal pure rendered code.
Designers need a live environment to test and document UI components like buttons, modals, and navbars.
Registry Updated:2/7/2026
Hiring managers need to see a candidate's coding thought process in real-time.
Developers need a clean environment to isolate and reproduce a front-end bug to share with a team.