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Easy, Simple HTML
Start with clean, beginner-friendly HTML that's easy to understand and modify.
Live Playground
Build Your First Web Page with AI. No Setup, Just Create.
Experience the magic of building your first web page with an AI assistant that guides you. Perfect for students, educators, and curious minds.
Focus
Students
Hands-on learning by doing.
Support
Educators
Perfect for classrooms.
Mindset
Curious Minds
Experiment at your pace.
Guided Collaboration
AI-Assisted Learning, Not AI Replacement — learn the fundamentals while discovering how to be productive with modern AI tools.
100%
CURRICULUM CONTROL
Live Demo
Free & open source
Coder Playground
See the AI editor in action
This is the exact free editor you launch—simple, accessible, and powered by AI for friendly help.
Access
Runs in any browser
Setup
Zero install required
License
AGPL-3.0 open source
Open Source & Adaptable
Fork it, remix it, and let AI edit the AI editor. Everything here is yours to adapt for your own classroom or project.
Built for Educators & Learners
AI-Assisted Learning, Not AI Replacement
Coder teaches you to work with AI as a collaborator, not a replacement. Learn the fundamentals while discovering how to be productive with modern AI tools.
Learn by Doing
Build a real web page, not just abstract exercises. See your code come to life instantly while understanding each piece you create.
AI as Your Mentor
Ask questions, get explanations, and receive guidance when stuck. Learn to collaborate with AI effectively—a crucial 21st-century skill.
Understanding Over Automation
Focus on comprehension, not completion. Learn to read, modify, and improve code rather than just generating it.
🎓
Perfect for Classrooms
- • No installation required—runs in any browser
- • Guided tutorials that teach HTML, CSS, and web fundamentals
- • AI assistant explains concepts instead of just providing answers
- • Students learn to ask good questions and work with AI tools
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Open Source & Customizable
- • Fork and modify for your specific curriculum needs
- • Add custom lessons, projects, or assessment tools
- • Self-host for complete control over student data
- • Community-driven improvements and feature requests
Licensed under AGPL-3.0 • Free for educational use • Community supported
Top 10 Highlights
Top 10 Features
Learn the essential skill of AI-assisted coding—build with confidence in the modern development world.
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Open AI Assistant
Ask Coder questions about the page, and see friendly, useful answers that teach along the way.
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Real-Time HTML Preview
Watch your web page come to life instantly as you learn and tweak your code.
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Teacher-Friendly
Great for classrooms—students can ask questions and get immediate, teachable answers.
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No Setup Required
Just open the link and start learning—no installs or configuration needed.
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Friendly Prompts
Thoughtful guiding prompts help learners understand each improvement.
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Playground-Style Editor
Mix HTML, CSS, and AI chat together in a single calm workspace.
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Dark Mode
Choose between light and dark themes for comfortable coding in any environment.
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Free & Open Source
Completely free to use with full source code available for customization and learning.
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Bring Your Own AI
Use any LLM or connect tools like n8n through custom webhooks for personalized assistance.