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    Node.js SandboxEnvironment Shim (v18.x)
    Terminal Output
    Booting Node Runtime...
    Loading Env...
    © WebFiddle.xyz

    About This Node.js Online Compiler

    Run Node.js code securely in your browser. Our Node.js sandbox simulates a backend environment with support for Async/Await, Process API, Buffer, and ES modules. Perfect for testing JavaScript backend logic without installing Node locally.

    Key Features

    • check_circleAsync/Await and top-level await support
    • check_circleProcess API and Buffer globals
    • check_circleES6+ module syntax
    • check_circleCode sharing via unique URLs
    • check_circleZero-setup — no installation required

    How to Use

    1. 1Write your Node.js code in the editor on the left.
    2. 2Click 'Run Code' to execute your script.
    3. 3View console output in the terminal panel.
    4. 4Share your code with the Share button.

    Frequently Asked Questions

    It simulates a Node.js environment in the browser with common globals like process, Buffer, and console. It's perfect for prototyping but doesn't support native modules.

    The sandbox supports importing ESM modules from CDNs. Native npm packages requiring filesystem or network access are not supported.

    Yes. All code execution happens client-side in your browser. Nothing is sent to a server.

    Embed this sandbox

    Drop this into any page and readers can run code without leaving it. The snippet travels in the URL, so there is nothing to host and no account to create. Open the sandbox, write your example, press Share, then paste that link’s query onto the embed URL to preload it.

    <iframe src="https://webfiddle.xyz/embed/javascript" width="100%" height="480" loading="lazy"
        style="border:1px solid #ddd;border-radius:8px"
        title="WebFiddle javascript sandbox"></iframe>
    Preview the embed