Many bloggers use shortened url to hide their affiliate links but it seem this is not a good way to promote affiliate products and services. I personally think that the main usage of shortened url is to shorten the long url into tiny url.

If you are looking for the free service to shorten the long url into tiny url which allow tracking, it is worth to check out URLZoom. By using their service, you will be able to replace your long url links with short url links and you can even track how many clicks the link received and from where the clicks are coming from with date and time as well.

Without register the URLZoom, you also can enter a long url to make it tiny on the frontpage of URLZoom, the only thing is that you are unable to enjoy the ability to track and analyze their short url links.