If you drag and drop a photo into the Google Image search bar, it also does a search like that. I even have an add-on on Chrome where I can just right click an image and there's an option to search it on Google.
Maybe Tinyeye is better though!
Originally Posted by lazyday
Reverse image search? whats that?
Look up pictures to see if they exist elsewhere.
Reverse Image Search: Finding people posting fake photos on the internet, one search at a time.