Bolt.new
Build full-stack web apps in your browser by describing what you want — no local setup needed
Bolt.new runs a full Node.js environment inside your browser using WebContainers. You describe what you want to build, it writes the code, and you see a live preview instantly. No installing Node, no terminal, no VS Code — just a browser tab.
This is genuinely useful for prototyping. You can go from “I need a landing page with a waitlist form” to a working app in minutes. But the limitations show up when you try to build something complex — the free tier token limits are tight, and the generated code sometimes needs cleanup before it is production-ready. Think of it as a rapid prototyping tool, not a replacement for a real development setup.
What's good
- Zero setup — open a browser tab and start building
- Live preview updates as the AI writes code
- Supports React, Next.js, Astro, and more out of the box
Watch out for
- Free tier token limits mean you hit walls mid-project
- Browser-based means no access to native tools, local databases, or heavy computation
- Generated code can be messy and hard to maintain long-term
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Replit Agent
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Vercel's AI that turns text descriptions and screenshots into polished React components using shadcn/ui
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