Turn GPX, GeoJSON, Shapefile, CSV or KMZ into clean KML for Google Earth and Google Maps. Everything runs in your browser — no file leaves the machine.
Google Earth — drag the KMZ straight into earth.google.com/web. Altitude and the vertical curtain only show up here, not on flat Google Maps.
Google My Maps — at mymaps.google.com, import the KML into a layer. Shareable by link, but it flattens everything to ground level and caps out around 2 000 features per layer.
Just looking — the Track Viewer opens the same files on OpenStreetMap or satellite imagery with no conversion at all.