KnowURL is a useful online service which allow users to find, retrieve or unshorten the original URL hidden behind the Shortened URL. It supports almost all small big URL shortening sites like bit.ly, tr.im, tinyurl and many more.
This can come handy when you’re unsure about the original link and want to confirm if it’s safe before opening it. The service also lets you scan the link for viruses.
Tip – If you want to expand and see the actual link hidden behind any url, shortened using Bit.ly service, then just add + sign at end of shorten link to see detailed stats.
Firefox users use UntinyFox add-on to automatically see original link behind short URL’s.
Link – www.knowurl.com