TL;DR: Bolt.new is a browser-based AI app builder by StackBlitz. Type a description → get a complete, running full-stack app with a live preview in the browser. Powered by Claude. Best for rapid prototyping, demos, and starting projects quickly. Export to GitHub or download the code when you outgrow the browser environment. Paid plans required for heavy use (~$20/month).
What Is Bolt.new?
Bolt.new is an AI-powered web application builder made by StackBlitz (the company behind the popular browser-based Node.js runtime). You describe an app in plain English, and Bolt generates:
- The full project structure and source files
- All necessary npm package dependencies
- A running live preview in the same browser tab
- An editable code view alongside the preview
It uses Anthropic's Claude as its underlying AI model and StackBlitz's WebContainers technology to run a full Node.js environment directly in the browser — no server required on the backend.
What a Bolt.new Prompt Looks Like
"Build a task management app with a clean dark UI. Users can create tasks, mark them complete, filter by status, and delete tasks. Use React with Tailwind CSS. Persist data in localStorage."
→ Bolt generates a complete React + Tailwind app, installs dependencies, and shows a running preview — in about 30–60 seconds.
How It Works
Under the hood, Bolt.new combines two technologies:
- Claude (Anthropic's AI): Interprets your description and generates code across all the necessary files
- WebContainers (StackBlitz): Runs a full Node.js environment inside your browser tab — including npm install, a dev server, and file system operations
This is why Bolt can run real frameworks (React, Next.js, Svelte) with full npm package support without sending your code to a remote server — it all runs locally in your browser tab.
What Bolt.new Is Good At
- Rapid prototyping: Going from idea to demo in under 10 minutes
- UI-heavy apps: Landing pages, dashboards, portfolio sites, simple SaaS UIs
- Client-only apps: Todo lists, calculators, games, tools that run entirely in the browser
- Starting a codebase: Generating a well-structured scaffold you then continue in Cursor
- Explaining concepts: "Show me what a React context looks like in a real component" — Bolt shows you live
Limitations to Know
- Complex backends: Real production backends (custom auth, complex Prisma schemas, multi-service architectures) work better in a local environment with Cursor
- Token limits: Each generation consumes tokens. Large, complex apps can exhaust the free tier in a few sessions
- Long iteration: As you refine an app across many prompts, context builds up and output quality degrades. Better to export and continue in a local IDE for long-term projects
- Proprietary APIs: Adding external API keys is possible but less ergonomic than a local environment with a .env file
Bolt.new vs. Other AI Tools
Bolt.new
Zero-to-running-app in <60s. Full browser experience. Great for prototypes and demos. Export when you outgrow it.
Cursor
Local IDE. Best for production projects, complex codebases, teams. Full control over environment. No generation limits.
Replit
Browser IDE with always-on hosting. Better for bots and scripts that need to stay running. More of an IDE; less of a zero-to-app generator.
v0 (Vercel)
Focused specifically on UI components (React/shadcn). Generates component code to copy into your existing project. Not a full app builder.
Recommended Bolt.new Workflow
- Prototype in Bolt: Generate your initial app structure quickly
- Iterate on UI and core logic: Refine through follow-up prompts while in Bolt
- Export to GitHub: When the prototype is solid, push to a GitHub repo
- Continue in Cursor: Open the repo locally, continue building with full local tooling
This "Bolt to Cursor" handoff is one of the most efficient patterns in the vibe coding toolkit — you get Bolt's rapid scaffolding speed and Cursor's power for ongoing development.
What to Learn Next
- Cursor Beginner's Guide — Where to take your Bolt.new project after export.
- What Is Replit? — Another browser-based coding platform, better for hosting bots and scripts.
- AI Prompting Guide for Coders — Better prompts produce better Bolt.new output.
Next Step
Go to bolt.new right now and build something small — a personal finance tracker, a habit logger, a countdown timer. The zero-friction experience is genuine. Even experienced developers use Bolt.new to prototype UI ideas before committing to a full local setup.
FAQ
Bolt.new is a browser-based AI app builder made by StackBlitz. You type a description of the app you want, and it generates a complete, running full-stack application with code and a live preview — all in the browser. It uses Claude (Anthropic) as its underlying AI model.
Bolt.new has a free tier with daily token limits. Heavy use — iterating on a complex app — will exhaust the free tier quickly. Paid plans start at around $20/month for more tokens and priority access.
Bolt.new generates apps from scratch in the browser with zero setup. Cursor is a local IDE (VS Code fork) for working on existing codebases with AI assistance. Bolt.new is better for rapid prototyping. Cursor is better for ongoing development of real projects.
Yes. Bolt.new lets you download the generated project as a zip file or push it directly to GitHub. From there you can open it in Cursor or VS Code for continued development with a full local environment.
Bolt.new supports React, Vue, Svelte, Next.js, Remix, Astro, Vite, and vanilla JavaScript/HTML/CSS projects. It can generate projects with common backend setups, though complex database configurations work better in a local environment.