Here you can activate the automatic url preview. When you then click on a reduced link of rename!me, you will not passed directly, but get to the url preview page of rename!me.

Here you will see the url first, which is hidden behind the shortend url and can then decide whether you want to follow this.

You can also use the shortcut append to any URL "+" to go to the preview page.

Let's pass directly to the auto preview and you can immediately see which URL is behind the short URL is hidden.