Are my KML files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.

Is converting KML to KMZ free?

Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.

Does converting KML to KMZ lose quality?

No. KMZ stores the same content without discarding anything, so the result is identical in quality to the original. Positions, elevation and timestamps are carried across. Sensor streams, styling and embedded imagery are not.

Do I need to install anything to open KMZ files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the KMZ afterwards needs whatever software normally handles Zipped KML on your device.

KMLtoKMZ

Convert KML to KMZ

Up to 3 files at once, 100 with Pro. Mixed formats are fine.

You can convert KML to KMZ free and without an account: drop the file above and the KMZ is ready to download in a second or two. The conversion happens inside your own browser, so the file is never uploaded — it works on Windows, Mac, Linux, iPhone and Android, and keeps working with the network switched off.

What KML and KMZ are for

The Google Earth and Maps format for places, lines and areas.

A KML file plus its images and icons, zipped into one file.

How to convert KML to KMZ

Drop your KML file onto this page, or click to pick one.
Choose KMZ as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished KMZ file.

KML vs KMZ: what changes

KML compared with KMZ
	KML	KMZ
Full name	Keyhole Markup Language	Zipped KML
File extension	.kml	.kmz
Media type	application/vnd.google-earth.kml+xml	application/vnd.google-earth.kmz

Quality: Nothing is lost. The result holds exactly the same picture, text or data as the original.
Where it runs: This conversion runs inside your browser. Your file is never uploaded, and it works with the network disconnected.
What can be lost: Positions, elevation and timestamps are carried across. Sensor streams, styling and embedded imagery are not.

KML to KMZ: common questions

Are my KML files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.
Is converting KML to KMZ free?: Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.
Does converting KML to KMZ lose quality?: No. KMZ stores the same content without discarding anything, so the result is identical in quality to the original. Positions, elevation and timestamps are carried across. Sensor streams, styling and embedded imagery are not.
Do I need to install anything to open KMZ files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the KMZ afterwards needs whatever software normally handles Zipped KML on your device.