Convert KML files to KMZ, online and free. GISConverter reads your KML data locally in the browser and writes a KMZ file so you can share it as a single, compact Google Earth file — nothing is uploaded, and your data never leaves your computer.
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KML, KMZ, SHP (.zip), GeoJSON, GPKG, GML, GPX, DXF, GeoTIFF, and more
KML is a vector GIS format, so it isn't always the format the next tool expects. Converting it to KMZ lets you share it as a single, compact Google Earth file without redrawing or re-collecting anything. Because GISConverter runs a full GDAL engine in your browser, the geometry and attributes carry across faithfully, and the file never leaves your device.
KML (.kml): KML is the XML-based format Google Earth and Google Maps use to describe points, lines, polygons, labels and styling. Because it is plain text it is easy to read, edit and share, and it stores coordinates in WGS84 longitude/latitude by default.
KMZ (.kmz): A KMZ file is simply a KML document compressed into a ZIP archive, optionally bundling icons, images and overlays alongside it. It is smaller than raw KML and is the format Google Earth exports by default, which makes it the usual way to hand a finished map to someone else.
Yes. GISConverter is completely free and runs in your browser — no signup, no watermark, and no daily limit.
No. Your KML file is read and converted locally on your device with a GDAL engine compiled to WebAssembly, so it never leaves your computer.
A KMZ file is simply a KML document compressed into a ZIP archive, optionally bundling icons, images and overlays alongside it.
KML is the XML-based format Google Earth and Google Maps use to describe points, lines, polygons, labels and styling.
Yes. Output defaults to EPSG:4326 (WGS84 longitude/latitude). Enter any EPSG code, such as EPSG:3857, in the coordinate-system box to reproject on the way out.
