Your file is read locally. Map tiles load from OpenStreetMap; file contents are not uploaded.
KML / KMZ Viewer
Drop a KML or KMZ file here, or try a sample to preview points, lines and polygons.
No file size cap; processing depends on your device memory. Network links, external icons, overlays, 3D models, styles and animations are not rendered. Heights are retained as data, not displayed in 3D.