CodeJS is a powerful, free online code editor that serves as an excellent alternative to JSBin, CodePen, and JSFiddle. What sets it apart is its unique integration of three AI assistants (Gemini 1.5 Pro, Claude 3.5 Sonnet, and GPT-4o) that provide contextual coding help while maintaining conversation history across models. The editor offers essential features like live preview, autocomplete, zen coding, and a built-in console, plus the ability to export projects as single HTML files. No sign-up required – just open your browser and start coding. It's fully responsive, working seamlessly across all devices and modern browsers. Key advantages over alternatives:

Integrated AI assistance with context awareness Zero setup required Clean, distraction-free interface One-click project export Mobile-optimized experience Open source and completely free

Perfect for both beginners looking for guidance and experienced developers seeking a streamlined coding environment with intelligent support.