DEV Community

Varinder Pal Singh
Varinder Pal Singh

Posted on

How to Build a White Screen Tool with HTML, CSS, and JavaScript

#webdev #javascript #css #html

A white screen tool is a simple utility that turns your browser into a blank, fullscreen white canvas. It’s surprisingly useful:

  • 📸 Photographers use it for lighting.
  • 🧪 Developers use it to test screens.
  • 💡 Some use it to brighten their room or reduce distractions.

White Screen Tool

In this quick tutorial, you’ll build your own white screen page using just HTML, CSS, and JavaScript — no libraries or frameworks required.

🛠️ Step 1: Create the HTML

We’ll start with a minimal structure and a button that will trigger the white screen mode.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>White Screen Tool</title>
  <link rel="stylesheet" href="styles.css" />
</head>
<body>
  <button class="button" onclick="goWhiteScreen()">Go Fullscreen White</button>
  <script src="script.js"></script>
</body>
</html>
Enter fullscreen mode Exit fullscreen mode

🎨 Step 2: Style the Page with CSS
We’ll make the button look nice and set up a class to make the background white when activated.

/* styles.css */
body {
  font-family: sans-serif;
  text-align: center;
  padding: 2rem;
  background: #f9f9f9;
  color: #333;
}

.button {
  padding: 1rem 2rem;
  font-size: 1.2rem;
  background-color: #0077cc;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

.button:hover {
  background-color: #005fa3;
}

.white-mode {
  background-color: white;
  color: white;
}
Enter fullscreen mode Exit fullscreen mode

🧠 Step 3: Add JavaScript to Go Fullscreen
We’ll add a small script that applies the white-mode class and uses the Fullscreen API.

// script.js
function goWhiteScreen() {
  document.body.classList.add("white-mode");

  if (document.documentElement.requestFullscreen) {
    document.documentElement.requestFullscreen();
  }
}
Enter fullscreen mode Exit fullscreen mode

✅ You’re Done! Try It Live
You now have a fully working white screen tool. Click the button to test it — it goes fullscreen and turns the screen white.

👉 Want a full‑featured version with dark mode toggle and zero distractions?
Try the live demo here: whitescreen.run

Bonus Ideas
Want to expand on this? Here are a few suggestions:

  • 🌙 Add a dark mode toggle.
  • ⌨️ Use keyboard shortcuts to toggle white mode.
  • 🕹️ Auto-enable fullscreen when the page loads.

Final Thoughts
Sometimes the simplest tools are the most effective. This project is a great starter for experimenting with the Fullscreen API, toggling styles, and learning how to build clean utility tools with just a few lines of code.

Feel free to fork it, enhance it, and share your version!

Top comments (0)