HTML Viewer

Live preview — scripts, styles & forms all run in-browser

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>Preview</title>
  <style>
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #0f172a;
      color: #e2e8f0;
      padding: 2rem;
      min-height: 100vh;
    }
    h1 { font-size: 2rem; font-weight: 700; color: #818cf8; margin-bottom: .75rem; }
    p  { color: #94a3b8; line-height: 1.65; margin-bottom: 1rem; }
    .card {
      background: #1e293b;
      border: 1px solid #334155;
      border-radius: 12px;
      padding: 1.25rem 1.5rem;
      margin-bottom: 1rem;
    }
    .badge {
      display: inline-block;
      padding: .2rem .65rem;
      border-radius: 999px;
      font-size: .75rem;
      font-weight: 600;
      background: #312e81;
      color: #a5b4fc;
      margin-right: .4rem;
    }
    button {
      margin-top: 1rem;
      padding: .55rem 1.25rem;
      background: #4f46e5;
      color: #fff;
      border: none;
      border-radius: 8px;
      font-size: .875rem;
      cursor: pointer;
    }
    button:hover { background: #4338ca; }
  </style>
</head>
<body>
  <h1>Hello, DevsTool!</h1>
  <p>Edit the HTML on the left — the preview updates instantly.</p>
  <div class="card">
    <p>
      <span class="badge">HTML</span>
      <span class="badge">CSS</span>
      <span class="badge">JS</span>
      Fully sandboxed. Scripts, styles, and forms all work.
    </p>
    <button onclick="this.textContent = 'It works! 🎉'">Click me</button>
  </div>
  <div class="card">
    <p>Switch between <strong>Desktop</strong>, <strong>Tablet</strong>, and <strong>Mobile</strong> widths using the toolbar above the preview.</p>
  </div>
</body>
</html>

Preview