00geo

KML

Keyhole Markup Language

KML is the Google Earth and Google My Maps format. Beyond geometry it carries styling, folders, descriptions and ground overlays, which is why maps exported from My Maps look right in Earth and plain everywhere else.

Extension: .kml
MIME type: application/vnd.google-earth.kml+xml

01 Convert KML to something else

KML to GPX For Garmin, Strava, Komoot and anything that eats GPX.
KML to GeoJSON ExtendedData becomes properties. Layer order preserved.
KML to CSV ExtendedData becomes columns, so your data survives.

02 Convert something else to KML

GPX to KML Handles the latitude/longitude swap that puts tracks in the sea.
KMZ to KML Extraction, not conversion — the document comes out unchanged.
GeoJSON to KML Properties become ExtendedData, so nothing is dropped.

03 Related formats

GPX
KMZ
GeoJSON

Opening a .kml file

If you landed here because something handed you a .kml file and nothing on your machine will open it, converting it to a format you already have a reader for is usually faster than installing new software. Every conversion above runs in this browser — the file is not uploaded, so it works on a locked-down work machine and on a file you are not allowed to send anywhere.