This simple example shows how Workflow can be used to get some HTML for a web page. The workflow asks the user to enter a web page URL. The contents of the URL are then retrieved. The retrieved page is then transformed to HTML using the Make HTML from Rich Text action and the final HTML is displayed to the user via a Quick Look action.
Note that this is a generated set of HTML and will not necessarily match the HTML used on the web page if you view the source of it.