To quote their own spin:
WebTools Pro is a must for any HTML coder or web designer. Ever wanted to instantly see all the forms, images or styles on a page? Ever wanted to see how the tables are laid out on your favorite site? Well now you can, and you can also see them on any page on the net! The WebTools Pro software manipulates the HTML that you view, providing reports and that hard to find information that will make you wonder why you ever 'Viewed Source'.