Build, preview, and ship complete web applications — from landing pages to React dashboards — entirely through conversation with Claude.
HTML/CSS/JSReactFull-StackLive Preview
🧠 What It Is
Claude Code can build complete web applications end-to-end — not just snippets. It reads your existing codebase, understands the full project structure, writes new components, wires up APIs, fixes bugs, and previews the result in a live browser window — all without leaving your editor.
The preview panel shows a real browser preview that updates as Claude writes files. You can click around, inspect console errors, and describe what's broken — Claude sees the same preview you do and iterates in real time.
Supported stacks: Vanilla HTML/CSS/JS, React + Vite, Next.js, Astro, SvelteKit, Vue 3, Express/Node backends, and static site generators like Eleventy or Hugo.
⚡ Common Web Frameworks
⚛️ReactComponent UI
▲Next.jsSSR + API routes
🔥AstroStatic + islands
🟢Vue 3Reactive UI
🌿SvelteCompiled UI
🟡VanillaNo framework
🟩ExpressNode backend
🦕Deno/BunModern runtimes
🛠️ 5 Real-World Examples
Example 01
Landing Page from Description
Describe your product in plain English and Claude builds a polished, responsive landing page with hero, features, pricing, and CTA sections — dark/light mode included.
PromptBuild a landing page for "FlowTask" — a project management SaaS. Include a hero with gradient headline, 3 feature cards, a pricing table (free/pro/team), and a footer. Use our brand colors: #6366f1 (purple) and #06b6d4 (cyan). Dark mode by default.
Example 02
React Dashboard with Charts
Build a complete analytics dashboard with real Chart.js or Recharts graphs, stat cards, a sidebar nav, and a data table — all wired together in React.
PromptCreate a React analytics dashboard. Left sidebar with nav icons. Top stat cards showing revenue, users, orders, and conversion rate. A line chart for monthly revenue, bar chart for top products. Use Recharts. Mock data is fine for now.
Example 03
Add Auth to Existing App
Drop Claude into your Next.js project and have it wire up NextAuth with Google OAuth, protect routes, add a session hook, and build login/logout UI — reading your existing code first.
PromptAdd Google OAuth authentication to this Next.js app. Use NextAuth.js. Protect /dashboard and all /api/user/* routes. Add a login button to the navbar and a logout button in the user menu. Read the existing layout.tsx first.
Example 04
Interactive Form with Validation
Build a multi-step form with Zod validation, error states, a progress indicator, and a success confirmation screen — in React with react-hook-form.
PromptBuild a 3-step signup form: Step 1 (name/email), Step 2 (plan selection with radio cards), Step 3 (credit card with Stripe Elements). Add Zod validation, inline error messages, and a progress bar. Use react-hook-form.
Example 05
Fix Visual Bugs via Screenshot
Share a screenshot of your broken UI with Claude, describe what's wrong, and it reads the relevant components and fixes the CSS/layout issues directly in your files.
Prompt[Attach screenshot] The modal is overlapping the sidebar on mobile and the close button is hidden behind the nav. Read components/Modal.tsx and fix the z-index and positioning so it works on all screen sizes.
🌐 Web App Builder Simulator interactive
Claude Code — Web App Builder
Click a quick-action to simulate building a web app feature.
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Pro tip: Give Claude a screenshot, Figma URL, or even a rough sketch and say "build this." The more visual context you provide, the closer the first output matches your vision — saving multiple iteration rounds.