Most of the times, we receive spam mails containing harmful and suspicious links in shortened urls. And if you want to know the real url behind that, you have to click on those urls. But now, you can know the real urls behind those shortened urls using this trick. So follow the steps below:
1. Visit THIS SITE.
2. Now enter the short url in the box and click X-RAY.

3. Viola...!! The real url is exposed now.

Enjoy.