https://giantnoise-dot-yamm-track.appspot.com/Redirect?ukey=1Sjhx0yMES6kGhyzSwbiri5rHbOwB17B8-WSnGn0ahiI-1850131864

This is display.cgi (source). It takes some text you enter into a form, and displays it for you as HTML. This is a great way to see how some HTML code looks in your (or someone else's) browser. So paste 'n go: