As far as I know, Facebook has never made a feature to allow you to see who viewed your profile and the reason has to do with privacy. There are many YouTube videos that claim to show you how to tell, but many of the softwares used in these videos have been reported to contain malware or other viruses, so don’t try to follow their directions.
Several of these videos will provide instructions for how to find something called “InitialChatFriendsList” but all that information will show you is a list of Facebook ID numbers which can be used to find the person’s profile but it only shows you people with whom you’ve already had contact.