KML, KMZ Viewer is a tool that views the .kml, .kmz (Zipped KML format) file in your browser. Free online tool to view KML, KMZ files from the web on a Google map. You can open KML, KMZ files from URL, Google Drive or from your computer. Provides connect with Google Drive. You can directly open a KML file from Google Drive. *What is a KML? Keyhole Markup Language (KML) is an XML notation for expressing geographic annotation and visualization within Internet-based, two-dimensional maps and three-dimensional Earth browsers. KML was developed for use with Google Earth, which was originally named Keyhole Earth Viewer. KML became an international standard of the Open Geospatial Consortium in 2008.