Paste the url where it says Alternatively, give an HTTP URI to use as input.
You may need to check or uncheck the base64 box; you may need to allow redirects or scripts for this page; and sadly, it may not work. But it may, and if it does, happy trails.
Click here to open base64encoded (both of which may help if entities bent on censorship are blacklisting my source), or here to open from the source directly. Thanks Hixie; I trust your servers can handle it.
*The title of this page is pronounced fuck web guard. Not to put too fine a point on it.