Web pages source cannot be protected by any means because the internet browsers can understand only HTML and other mark up languages.

Most of the website and softwares use javascript to encode the content and the same javascipt is used to decrypt the content at the client

While trying to view source of source if you find the content are encrypted by javascript. Here is one way to reveal the source content of web pages.

Just copy and paste the below lines in to address bar of the encrypted website now you can view the javascript generated original HTML source

javascript:var sorc=document.documentElement.outerHTML;document.open("text/plain");document.write(sorc);

This can break all the encrypted code generated by the softwares namely HTML Protector, HTML Guardian and others.

This can decrypt the code generated by the escape and unescape functions of the javascript