Are my TCX 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 TCX to KML 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 TCX to KML lose quality?

TCX and KML describe content in fundamentally different ways, so the conversion is a reconstruction rather than a copy. The result is faithful, but not byte-for-byte equivalent. Positions, elevation and timestamps are carried across. Sensor streams, styling and embedded imagery are not.

Do I need to install anything to open KML files?

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

TCXtoKML

Convert TCX to KML

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

You can convert TCX to KML free and without an account: drop the file above and the KML 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 TCX and KML are for

Garmin training data — heart rate, laps and cadence alongside the track.

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

How to convert TCX to KML

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

TCX vs KML: what changes

TCX compared with KML
	TCX	KML
Full name	Training Center XML	Keyhole Markup Language
File extension	.tcx	.kml
Media type	application/vnd.garmin.tcx+xml	application/vnd.google-earth.kml+xml

Quality: The result is a close reconstruction rather than an exact copy. Check it before relying on it.
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.

TCX to KML: common questions

Are my TCX 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 TCX to KML 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 TCX to KML lose quality?: TCX and KML describe content in fundamentally different ways, so the conversion is a reconstruction rather than a copy. The result is faithful, but not byte-for-byte equivalent. Positions, elevation and timestamps are carried across. Sensor streams, styling and embedded imagery are not.
Do I need to install anything to open KML files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the KML afterwards needs whatever software normally handles Keyhole Markup Language on your device.