You’ll need to convert all your <
to <
and all your >
to >
and wrap everything in <pre>
and </pre>
tags. Like so:
<pre>
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
<body>
<h1>This is a Heading</h1>
<p>This is a paragraph.</p>
</body>
</html>
</pre>