OK, so lets see how this tool works.

First go ahead and bookmark this site, (I have a tab on my browser marked Google and I saved all of the cool free tools there) then open it up.

Google Link Shortener

OK, now go copy an address you would like to cloak. I will use one of my affiliate addresses off of the WA website.

here is what my link looks like before I cloak it:

http://www.wealthyaffiliate.com?a_aid=685886aa

As with most affiliate links you can tell just by looking at it that this is an affiliate link simply by the numbers at the end of the link.

Now, here is the same link after I converted it through the Google Link Shortener Tool.

http://goo.gl/1JaXqD

Go ahead and click them both, they both go to the same place but the lower one looks so much more professional to me.