Difference Between KML and KMZ
KML vs. KMZ Both KML and KMZ are file extensions used in Google applications, specifically Google Earth and Google Maps. A person using these two Google applications can encounter a lot of file formats, including KML and KMZ.
Both KML and KMZ files are compatible and can be opened by Google Earth and Google Maps – two Google applications that deal with geographic images.
KML is an acronym for “Keyhole Markup Language” developed by Google and Keyhole, Inc.