The JavaScript playground with AI coding assistant

Intelligent coding assistance for HTML, CSS, and JavaScript all in one place.

Features

Code with Confidence: Powerful Tools, Intelligent Assistance

Streamline Your Workflow with CodeJS: Live Preview, AI-Powered Assistance, and One-Click Project Export

The Code Editor

HTML, CSS, JS

  •   Code Completion
  •   zen coding
  •   Code Beautifier
  •   Adaptive Autocomplete
  •   Built-In Console
  •   Responsive Design
Free AI Assistance

Ask AI

  •   GPT-4o
  •   Calaude 3.5 Sonnet
  •   Gemini 1.5 Pro
  •   Context Awareness
  •   Switch Between Models
  •   Context Sharing
The Output

Prewiew

  •   Live Preview Output
  •   Desktop Mode
  •   Tablet Mode
  •   Mobile Mode
  •   Full Screen Preview
  •   One-Click Export
FAQ

Frequently Asked Questions

Have another question? Contact us on Twitter or by email.

CodeJS stands apart from traditional web-based code editors through its seamless integration of powerful features and cutting-edge AI assistance. While many online editors focus solely on the basics of code writing and previewing, CodeJS takes things to the next level by embedding intelligent chat-based support right into the coding experience.


The key differentiator is CodeJS's trio of AI assistants - Gemini 1.5 Pro, Claude 3.5 Sonnet, and the renowned GPT-4. What makes the AI assistance in CodeJS so unique is its ability to maintain full context, even between models. You can freely switch between the AI assistants while they pick up right where you left off, making the assistance feel seamless and tailored to your specific needs.


Beyond the AI features, CodeJS also offers a robust set of coding tools - live preview, autocomplete, zen coding, and one-click project export, to name a few. The combination of powerful features and intelligent assistance is what truly sets CodeJS apart as an online code editor.


The AI assistant feature in CodeJS is designed to be both powerful and intuitive. Think of it as having three expert coding companions right in your editor - Gemini 1.5 Pro, Claude 3.5 Sonnet, and GPT-4o. Here's how it works:


Chat Interface:


  • The AI chat panel sits right alongside your code editor
  • You can type questions, request suggestions, or ask for help directly in the chat
  • Switch between AI models with a simple click while maintaining conversation context

Context Awareness:


  • The AI assistants can see your current HTML, CSS, and JavaScript code
  • They understand the structure of your project and can reference specific parts of your code
  • Previous conversations are maintained, so the AI remembers what you've discussed

What You Can Do:


  • Get real-time coding suggestions and improvements
  • Debug issues with intelligent error analysis
  • Ask for explanations of complex code concepts
  • Receive guidance on best practices
  • Generate code snippets based on your requirements
  • Get help with optimization and performance

Switching Between AI Models:


  • Each AI model has its own strengths and specialties
  • Switch between models seamlessly without losing context
  • Continue conversations where you left off, even with a different AI
  • Compare suggestions from different AI models for better insights

The AI assistant feature is designed to enhance your coding workflow naturally, providing help when you need it while letting you maintain full control over your development process.

Yes, CodeJS is completely free to use, and no, you don't need to create an account! We believe in making powerful development tools accessible to everyone, so we've kept things simple and straightforward.


Cost:


  • 100% free to use
  • No hidden fees or premium features
  • No credit card required
  • No usage limits or restrictions
  • Free access to all three AI assistants (Gemini 1.5 Pro, Claude 3.5 Sonnet, and GPT-4)

Account Requirements:


  • No sign-up needed
  • No email required
  • No login process
  • Just open your browser and start coding

Open Source:


  • CodeJS is open source software
  • The source code is freely available on GitHub
  • You can contribute to the project if you'd like
  • Licensed under MIT license for maximum flexibility

We've deliberately kept CodeJS free and account-less to reduce friction and make it as accessible as possible for developers, students, and coding enthusiasts worldwide. Just visit the website, and you're ready to start coding!

CodeJS is designed specifically for web development, supporting the core web technologies


Supported Languages:


  • HTML
  • CSS
  • JavaScript

Not yet. Although we are working on making projects shareable via link.

Simply click on the download icon, and you're done.

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No sign-up, no installation, no limits. Just pure coding power enhanced by AI. Try CodeJS now.