KMZ to GeoJSON Converter

What Is KMZ to GeoJSON Conversion and Why Does It Matter?

A KMZ file is a compressed container format used primarily by Google Earth to store geographic data such as placemarks, paths, polygons, icons and styling information. Because a KMZ file is essentially a zipped KML document, it cannot be directly read by most modern web mapping libraries. GeoJSON, on the other hand, is an open, human-readable, JSON-based standard supported natively by libraries like Leaflet, Mapbox GL JS, OpenLayers and Turf.js. Converting a KMZ file to GeoJSON bridges this gap, allowing GIS professionals, developers and hobbyist mapmakers to bring Google Earth data directly into modern browser-based mapping applications without any manual reformatting.

The process of KMZ file conversion involves two distinct stages. First, the KMZ archive must be unzipped to reveal the embedded KML document, along with any linked images or icons. Second, the KML's XML structure — including Placemark, Point, LineString, Polygon and MultiGeometry elements — must be walked and translated into GeoJSON's Feature and FeatureCollection structure. This tool performs both stages entirely within your browser using JavaScript, so your location data is never transmitted anywhere.

How to Convert a KMZ File to GeoJSON

To convert a KMZ file to GeoJSON using this tool, simply drag your .kmz file into the upload area above, or click to browse your device. Once selected, click "Convert to GeoJSON" and the tool will automatically extract the internal KML, parse every geographic feature, and generate a valid GeoJSON FeatureCollection. You can then adjust coordinate precision, choose whether to retain name and description properties, and decide if style hints such as icon URLs or line colors should be preserved as custom GeoJSON properties.

Common Use Cases for KMZ File to GeoJSON Conversion

Developers building web maps often need to convert KMZ file to GeoJSON to display boundaries, routes or points of interest originally created in Google Earth or Google My Maps. Urban planners exporting zoning data, surveyors sharing property boundaries, and environmental researchers distributing habitat polygons all rely on this conversion to make their KMZ datasets compatible with open-source GIS tools. Because GeoJSON integrates cleanly with JavaScript mapping frameworks, converting KMZ to GeoJSON is often the first step before rendering spatial data on an interactive web map.

Example: KMZ to GeoJSON in Practice

Consider a KMZ file exported from Google Earth containing a single placemark named "Warehouse A" with a latitude and longitude pair. After conversion, this becomes a GeoJSON Feature with a Point geometry and a properties object containing the name "Warehouse A". More complex KMZ files with folders of polygons representing delivery zones convert into a FeatureCollection where each polygon becomes an individual Feature, ready to be styled and rendered on any Leaflet or Mapbox map with just a few lines of code.