Fastpen is an open source alternative to codepen that just stores the source code compressed, in the url.
Cost / License
- Free
- Open Source (MIT)
Application type
Platforms
- Online


Replit is described as 'In-browser IDE supporting 50+ languages with an AI assistant, real-time collaboration, Git support, hosting, deployment, and live code sharing' and is a very popular Code Editor in the development category. There are more than 100 alternatives to Replit for a variety of platforms, including Web-based, SaaS, Mac, Windows and Linux apps. The best Replit alternative is Visual Studio Code, which is free. Other great apps like Replit are Google Antigravity, Lovable, CodePen and Devin Desktop.
Fastpen is an open source alternative to codepen that just stores the source code compressed, in the url.



Flems is a playground for web development. It's ideal for prototyping ideas & sharing working front-end code examples.





Freebuff is a development platform that provides free access to AI coding agents through multiple interfaces, including a Desktop application, a Command Line Interface (CLI), a Web app builder, and a Cloud-based IDE.






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Bit helps you share, discover and use code components between projects and applications to build new features and products faster with your team. It's the fastest way to share and sync React.js and Vue.js UI components, Node.js modules and shared code without the overhead.

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CodeBuddy IDE is built to create a symbiotic environment where product, design, development, and deployment flow into one another without friction. By embedding AI deeply into every step—from requirement planning and product design to coding and go-live—it delivers a one-stop...



