What is the Live HTML Previewer?

The Live HTML Previewer is a real-time code editor that allows you to write HTML, CSS, and JavaScript and see the rendered output instantly in a split-screen view.

Is my code saved on your servers?

No, all processing happens locally in your browser. Your code is never sent to our servers, ensuring complete privacy and security.

Can I use external libraries like Bootstrap or Tailwind?

Yes, you can include external CSS or JS libraries using or tags within the HTML editor section.

Live HTML/CSS/JS Previewer

Write your code on the left and see the live result on the right instantly.

Code Editor

<!DOCTYPE html>
<html>
<head>
<style>
  body { font-family: sans-serif; text-align: center; padding-top: 50px; }
  h1 { color: #4f46e5; }
  .btn { background: #4f46e5; color: white; border: none; padding: 10px 20px; border-radius: 5px; cursor: pointer; }
</style>

</head>
<body>
  <h1>Hello SmartGen!</h1>
  <p>Edit this code to see live changes.</p>
  <button class="btn" onclick="alert('It works!')">Click Me</button>

<div id="cookie-consent-banner">
        <div class="cookie-container">
            <p class="cookie-text">
                We use cookies to improve your experience, analyze site traffic, and serve personalized ads. By continuing to use our site, you consent to our <a href="/privacy/" class="cookie-link">Privacy Policy</a> and <a href="/cookies/" class="cookie-link">Cookie Policy</a>.
            </p>
            <div class="cookie-actions">
                <a href="/privacy/" class="cookie-link">Learn More</a>
                <button id="accept-cookies" class="cookie-btn">Accept</button>
            </div>
        </div>
    </div>

</body>
</html>

Live Preview

What Is a Live HTML/CSS/JS Previewer?

A live HTML previewer renders your HTML, CSS, and JavaScript in real time as you type — no local dev server, no saving a file, no refreshing a browser tab yourself. It's the fastest way to test a snippet, debug a layout issue, or prototype an idea before it goes into a real project.

Write code in the editor and watch the preview update live in an isolated iframe — nothing is uploaded or executed anywhere but your own browser.

Why Use This Online HTML Previewer

⚡ Live, Real-Time Rendering

See your output update as you type — no manual refresh needed.

🧪 No Setup Required

No local server, no build tools — just open the page and start writing.

🔒 Sandboxed Preview

Code runs inside an isolated iframe in your own browser, not on a server.

How to Preview HTML, CSS, and JS Live

Write or paste your code into the editor — full HTML documents, including inline <style> and <script> tags, are supported.
Watch the live preview update in the panel next to the editor as you type.
Use fullscreen mode to focus entirely on the preview when you want to check the layout without the editor in view.

What This Tool Is Good For

1. Testing a snippet from Stack Overflow or documentation

Paste example code to see exactly how it renders before adopting it in your own project.

2. Quick CSS layout experiments

Try out flexbox, grid, or animation ideas without spinning up a project — just to see how a technique behaves.

3. Building a small standalone HTML email or widget

For something that doesn't need a build pipeline, write and check the final markup directly here.

Frequently Asked Questions (FAQ)

Q: Can I use external CSS/JS libraries?

A: Yes — you can include a <script src="..."> or <link> tag pointing to a public CDN URL inside your HTML, just as you would in a real page.

Q: Is my code sent to a server to render the preview?

A: No — the preview renders in a sandboxed iframe entirely within your browser.

Q: Does this save my code?

A: Not automatically to a server — treat it as a scratchpad and copy out anything you want to keep before closing the tab.

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