Node Sandbox.In-Browser.

Run server-side Next.js or Vite on any device. Zero infrastructure, infinite compute, available instantly.

Start building Open the playground

Built foryour Node stack.

Node.js

Next.js

Vite

React

Astro

TanStack Start

Express

Solid

The platform

Run AI-generated code securely in the browser.

Add terminals, previews, code execution, package installation, and AI coding agents without operating remote compute.

sandbox.ts

import { Sandbox } from "@nodesandbox-ai/client";

const sandbox = await Sandbox.create({
  apiKey: "ns_pub_...",
  source: {
    type: "git",
    url: "https://github.com/vercel/nextjs-template",
  },
});

const preview = await sandbox.start();
console.log(preview.url);

A real Node.js runtime, without server infrastructure.

Boot complete development environments inside the browser with a virtual filesystem, shell, package manager, and local server support.

Claude Code v2.1.276

Welcome back!

Fable 5.1

NodeSandbox

~/my-app

Tips for getting started

Build a Next.js app

What's new

Runs in the browser

Terminal and previews

/release-notes for more

Bash(bun run build)Compiled successfully in 1.2s(ctrl+o to expand)

▲ Next.js ✓ Compiled successfully

·Thinking…(0s · esc to interrupt)

xhigh · /effort

auto mode on (shift+tab to cycle) · ← for agents

Run Claude Code in browser

Claude Code runs inside the sandbox on your users’ devices, with a terminal, files, and live previews. No remote compute to operate.

Controlled networkingAllowed domains · your proxy

Your stack. All in the browser.

A browser, Node runtime, Next.js, and virtual files. Configure allowed domains, route requests through your proxy, and keep credentials on infrastructure you control.

Unlimited compute. No meter.

Every plan includes unlimited browser runtime. Compute stays on your users’ devices, with no per-minute charges or idle virtual machines.

Run Next.js, Vite, and more.

Install npm packages and run modern development servers for React, Vite, Next.js, Astro, and more.

AI-code execution in the browser

Add terminals, previews, code execution, package installation, and AI coding agents without operating remote compute.

Code generation

Let users run and verify generated applications immediately.

Interactive learning

Teach real tooling in an isolated environment that starts instantly.

AI coding agents

Give agents a filesystem, shell, package manager, and live preview.

Embedded IDEs

Build custom development workflows without a remote workspace fleet.

Browser-native compute.

Run server-side Next.js or Vite on any device. Zero infrastructure, infinite compute, available instantly.

ZeroInfrastructure to run or scale

UnlimitedCompute, on every plan

EverywhereRuns on the user's device, worldwide

AI-code executionin the browser

Spend your budget on the product, not idle compute.

Start building