Is this tool free to use?

Yes, this tool is completely free to use. No registration, subscription, or payment is required. All processing happens directly in your browser.

Does this tool upload data to a server?

No. All processing happens locally in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security. The tool works even when offline.

Does this tool work on mobile devices?

Yes, this tool is fully responsive and works on all modern browsers including Chrome, Safari, Firefox, and Edge on desktop, tablet, and mobile devices.

Is an internet connection required to use this tool?

No internet connection is required after the page loads. Since all processing happens in your browser, you can use this tool offline once the page is loaded.

Is there a file size limit?

There is no server-side file size limit since files are processed locally in your browser. The only limitation is your device's memory (RAM). For very large files, we recommend processing them in smaller chunks.

🔧 HTML Live Preview

Free online HTML live preview editor. Write HTML/CSS/JS code on the left and see instant rendered output on the right. Features auto-refresh, responsive preview, and one-click code copy. Perfect for frontend development and learning.

HTML / CSS / JS Code

<!DOCTYPE html>
<html>
<head>
<style>
body{font-family:sans-serif;padding:20px;background:#f8fafc;color:#1e293b}
h1{color:#06b6d4}
.card{background:white;border-radius:8px;padding:16px;box-shadow:0 2px 4px rgba(0,0,0,.1);margin:10px 0}
button{background:#06b6d4;color:white;border:none;padding:8px 16px;border-radius:6px;cursor:pointer}
button:hover{background:#0891b2}
</style>

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "BreadcrumbList",
  "itemListElement": [
    {
      "@type": "ListItem",
      "position": 1,
      "name": "Home",
      "item": "https://webtools-cn.github.io/tools-site/en/"
    },
    {
      "@type": "ListItem",
      "position": 2,
      "name": "Online Tools",
      "item": "https://webtools-cn.github.io/tools-site/en/#online-tools"
    },
    {
      "@type": "ListItem",
      "position": 3,
      "name": "🔧 HTML Live Preview",
      "item": "https://webtools-cn.github.io/tools-site/en/html-preview/"
    }
  ]
}
</script>
</head>
<body>
<h1>👋 Hello, World!</h1>
<div class="card">
  <p>Edit code on the left, see live preview on the right.</p>
  <button onclick="alert('Hello!')">Click me</button>
</div>

<!-- Feedback Widget -->
<div id="feedback-widget" style="position:fixed;bottom:20px;right:20px;z-index:1000">
<button id="feedback-toggle" onclick="toggleFeedback()" style="width:48px;height:48px;border-radius:50%;background:rgba(6,182,212,.2);border:2px solid rgba(6,182,212,.5);color:#22d3ee;font-size:1.2rem;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,.3);transition:all .2s" onmouseover="this.style.background='rgba(6,182,212,.4)'" onmouseout="this.style.background='rgba(6,182,212,.2)'">💬</button>
<div id="feedback-panel" style="display:none;position:absolute;bottom:56px;right:0;width:320px;background:#1e293b;border:1px solid rgba(6,182,212,.3);border-radius:12px;padding:16px;box-shadow:0 8px 24px rgba(0,0,0,.4)">
<div style="display:flex;justify-content:space-between;align-items:center;margin-bottom:12px">
<span style="color:#f1f5f9;font-size:.95rem;font-weight:600">📝 Feedback</span>
<button onclick="toggleFeedback()" style="background:none;border:none;color:#64748b;font-size:1.2rem;cursor:pointer">✕</button>
</div>
<select id="feedback-type" style="width:100%;background:#0f172a;border:1px solid rgba(148,163,184,.2);border-radius:6px;padding:8px 10px;color:#e2e8f0;font-size:.85rem;margin-bottom:8px;outline:none">
<option value="feedback">💡 Feature Request</option>
<option value="bug">🐛 Bug Report</option>
<option value="other">💬 Other</option>
</select>
<textarea id="feedback-text" placeholder="Describe your suggestion or issue..." style="width:100%;height:100px;background:#0f172a;border:1px solid rgba(148,163,184,.2);border-radius:6px;padding:10px;color:#e2e8f0;font-size:.85rem;resize:vertical;outline:none;font-family:inherit" maxlength="1000">

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