Home : File Types : KML File

.KML File Extension

File TypeKeyhole Markup Language File

3.7 (138 Votes)
CategoryGIS Files

What is a KML file?

A KML file stores geographic modeling information in XML format. It includes points, lines, polygons, and images. KML files are used to identify and label locations, create different camera angles, overlay textures, and add HTML content.

More Information

Screenshot of a .kml file in Google Earth 7

KML file open in Google Earth 7

KML files were originally used by Keyhole mapping software developed by Keyhole, Inc. The company was acquired by Google in 2004 and KML files are now used by used by Google Earth and other Earth browser programs.

NOTE: You can open a KML file in Google Maps by hosting it on an online location and then typing the URL in the Google Maps search box. For example, if you host your KML file at http://mywebsite.com/myfile.kml, then type this URL in the Google Maps search box to display it.

Alternatively, you can construct the URL yourself in Google Maps by prefixing your KML file's URL with http://maps.google.com/maps?q=. For example, to open the same KML file from above, you can use the following URL:


This procedure also works for Google Earth, the 3D earth-browsing plug-in you can add to your Web browser.

Open over 300 file formats with File Viewer Plus.
Programs that open KML files
Updated 5/3/2018

About KML Files

Our goal is to help you understand what a file with a *.kml suffix is and how to open it.

The Keyhole Markup Language file type, file format description, and Mac, Windows, Linux, Android, and iOS programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

If you would like to suggest any additions or updates to this page, please let us know.