Convert KML (.kml) to KMZ (.kmz)

RouteConverter opens KML files and saves them as KMZ — free, offline, no upload required.

How to convert .kml to .kmz

1. Open the .kml file via File → Open.
2. Pick KMZ in the Save as dropdown.
3. Choose where to save it via File → Save as.

About KML (.kml)

KML (Keyhole Markup Language) is an XML format for placemarks, paths and polygons, built for map visualization rather than device navigation. It's native to Google Earth and Google Maps' "My Maps", and read by most desktop GIS tools.

About KMZ (.kmz)

KMZ is a zipped KML file — the same placemarks, paths and polygons, plus any bundled icons or ground-overlay images, in one smaller download. Opened by the same viewers as KML: Google Earth and Google Maps.

Download RouteConverter — Windows, macOS, Linux, free.

Related conversions

• GPX to KML
• KML to GPX
• KMZ to GPX

FAQ

Can RouteConverter convert .kml to .kmz for free?

Yes. RouteConverter is free and open source. Opening a KML file and saving it as KMZ does not require an account, a subscription, or an internet connection.

Does the file get uploaded anywhere?

No. RouteConverter runs on your own computer (Windows, macOS or Linux) and converts the file locally — nothing is sent to a server.

Can I convert .kmz back to .kml?

Usually yes — open the KMZ file and pick KML in the Save-as dropdown. Fields the target format cannot represent are dropped with a warning.