E2B Fragments

E2B Fragments is a production-ready open-source starter that lets users generate and run full-stack web applications from natural language prompts. Built on Next.js, it uses E2B secure cloud sandboxes for safe code execution and streams generated apps in real time — think an open-source v0.dev or Replit Agent you can self-host.

Key features

• AI code generation — Claude, GPT-4o, or Fireworks generate runnable apps from a text prompt
• E2B sandbox execution — generated code runs in isolated cloud containers (no host machine risk)
• Real-time streaming — code and UI appear progressively as the model generates
• Multi-framework support — generates Next.js, Streamlit, Python, and Gradio apps
• Bring your own model — swap in any supported LLM via a single env var
• One-click deploy — ships with a Vercel deploy button and Docker support

Quick start

npx ai-supply add e2b-fragments-ai-app-starter

# Or clone and run directly
git clone https://github.com/e2b-dev/fragments
cd fragments
cp .env.example .env.local
# Set E2B_API_KEY and ANTHROPIC_API_KEY in .env.local
npm install
npm run dev

Open http://localhost:3000 and type a prompt like: "Build a to-do app with local storage".

Curated mirror of the open-source E2B Fragments project (Apache-2.0). Install upstream from the repository.