It was a huge success. The Great Dictator was the first Hollywood movie to condemn Hitler and made him look like a fool. Hitler banned The Great Dictator in Germany and all countries run by the Nazis.
However, years after it was released, Charlie Chaplin said that he would have canned The Great Dictator had he known about the actual horrors of the Nazi concentration camps at the time. “Had I known, … I could not have made fun of the homicidal insanity of the Nazis.” [x]