You mean shortened urls? Then something like this will be useful:
KnowURL: Expand Original URL From Shortened URL
http://checkshorturl.com/
GetLinkInfo :: Expand tinyurl/bit.ly URLs, get YouTube video info, get webpage title/description, find URL redirections
If not and you are talking about a full url that looks suspicious, I think you can Whois it and see if it seems legitimate.
https://who.is/