Watermark on a HTML can be add by using
with CSS.
<html> <head> <title>Water Mark</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <style> #watermark { position: fixed; z-index: 99999; width: 100%; text-align: center; margin-top: 5%; } #watermark p { position: absolute; width: 100%; height: 100%; opacity: 0.15; color: #FF0000; font-size: 200px; pointer-events: none; } </style> </head> <body> <div id="watermark"> <p>Watermark</p> </div> <div> <p>My HTML Content...</p> </div> <div> <p>My HTML Content...</p> </div> </body> </html>