Build and prototype web content with instant previews. From quick HTML experiments to production email templates.
Write HTML, CSS, and JavaScript with instant live preview. Perfect for prototyping and learning.
Create responsive email templates with MJML and export to HTML compatible with all email clients.
Encode text to Base64 and decode Base64 back to text. UTF-8 support, file encoding, and live conversion.
<div class="card">
<h1>Hello World</h1>
<p>Welcome to the playground!</p>
<button onclick="sayHello()">
Click Me
</button>
</div>Welcome to the playground!