How do I open a converted GeoJSON in Google Earth?

Download the generated .kml file from our converter. Double-click to open it directly in Google Earth Pro desktop, or in Google Earth Web click Projects > Open > Import KML file from computer.

Why does KML use [Longitude, Latitude, Altitude] coordinate ordering?

The OGC KML specification follows the standard Cartesian 3D convention where X = Longitude, Y = Latitude, and Z = Altitude (in meters above the WGS84 ellipsoid).

Does converting GeoJSON to KML preserve table properties and metadata?

Yes. All feature properties and attributes (such as name, description, timestamps, and custom keys) are mapped into standard KML , , and tags.

Can I convert GeoJSON polygons with holes into KML?

Yes. GeoJSON polygon holes are automatically mapped into KML XML elements, maintaining perfect topological cutouts.

Is there a file size limit for converting GeoJSON to KML online?

Because all parsing and XML serialization run 100% locally in your browser memory, you can convert multi-megabyte GeoJSON datasets without hitting server upload limits.

Free Online GIS Utility

Zero Sign-Up & Client-Side Privacy

WGS84 Ellipsoidal Geodesics

GeoJSON to KML Converter

Convert RFC 7946 GeoJSON files to Google Earth KML 2.2 files with 100% in-browser privacy.

Direct Answer & Core Functionality

The GeoJSON to KML Converter transforms RFC 7946 GeoJSON FeatureCollections, Points, LineStrings, and Polygons into Keyhole Markup Language (KML 2.2) files for Google Earth, ArcGIS Earth, and desktop GIS suites with 100% client-side privacy.

Input GeoJSON Upload File

Output KML

Converted output will appear here after clicking Convert...

Processed 100% locally in your browser. Zero data transmission.

GeoJSON to KML Technical Specifications & Standards

Reference ISO / OGC Standard

Geodetic Datum

WGS84 (EPSG:4326)

Standard global ellipsoidal coordinate reference system

Mathematical Engine

OGC Geodesics

Sub-meter coordinate preservation

Vector & Data Exports

GeoJSON · KML · CSV · SVG

Compatible with QGIS, ArcGIS, Google Earth & CAD

Privacy & Processing

100% Client-Side

Calculations run in-browser. Zero coordinate logging.

How to Use the GeoJSON to KML Converter

Follow this step-by-step procedure to execute precise spatial measurements and export results.

1
Paste or upload GeoJSON: Upload a .geojson or .json file or paste raw code into the input editor.
2
Click Convert: The in-browser engine parses geometries, attributes, and coordinates into XML KML nodes.
3
Review KML XML: Inspect the generated Placemark, LineString, and Polygon XML structures.
4
Download .kml file: Save the converted KML file to open directly in Google Earth.

Accuracy & Benchmark Standard

Geodesic Precision vs. Competitor Mapping Approaches

Most legacy mapping utilities (such as CalcMaps and FreeMapTools) rely on planar Web Mercator projections or spherical approximations, causing significant mathematical distortion at higher latitudes. GeoMap Suite computes exact ellipsoidal geodesics on the WGS84 reference ellipsoid.

Calculation Model	Mathematical Basis	Distortion on WGS84	Standard Tools	Practical Application
Planar (Web Mercator)	Cartesian dx² + dy²	10% to 200%+ error	CalcMaps / Simple map tools	Distorts drastically away from equator. Inaccurate for true distance.
Spherical Great-Circle	Haversine (R = 6,371 km)	Up to 0.5% (~5 km/1,000 km)	Basic Google Maps wrappers	Ignores Earth's polar flattening. Reasonable for rough estimates.
GeoMap Suite Ellipsoidal	Karney Direct/Inverse WGS84	< 15 nanometers (<0.0001%)	GeoMap Suite	Geodetic surveying, maritime, flight paths & legal boundary analysis.

Worked Example: Converting GeoJSON City Points to Google Earth Placemarks

A cartographer exports a web map dataset into Google Earth KML for 3D fly-through presentation.

Input Parameters

Input GeoJSON: {"type":"Feature","properties":{"name":"Headquarters"},"geometry":{"type":"Point","coordinates":[-122.4194, 37.7749]}}

Computed Outputs

Target Format: OGC KML 2.2 XML
Google Earth Compatibility: 100% Compatible

Step-by-Step Mathematical Process

Parse GeoJSON Point geometry coordinates [-122.4194, 37.7749].
Format XML Placemark element with <name> and <Point><coordinates>-122.4194,37.7749,0</coordinates></Point>.
Wrap inside standard KML 2.2 Document envelope.

Practical Takeaway: KML coordinates use comma-separated "longitude,latitude,altitude" ordering.

Understanding Your Results & Practical Interpretation

Preserving Metadata Properties

Feature property fields (name, description, category) are automatically converted into KML Placemark <name> and <ExtendedData> XML tags.

Practical Applications & Real-World Use Cases

Cartographers, Educators

Google Earth 3D Visualization

Import custom GeoJSON datasets into Google Earth for 3D terrain visualization.

Mathematical Methodology & Geodetic Accuracy

OGC KML 2.2 XML Serialization

Maps GeoJSON Feature properties and geometry structures into valid OpenGIS KML 2.2 XML documents.

GeoJSON -> DOMParser / XMLSerializer -> KML 2.2

Geodetic Datum & Reference FrameWGS84 (EPSG:4326)

Theoretical Computation PrecisionSub-meter coordinate preservation

Limitations & Boundary Conditions

•Complex MultiGeometry collections are mapped to individual KML Placemarks.

Authoritative Reference Standards

OGC KML 2.2 Standard Explore Geospatial Blog & Studies →

Troubleshooting & Geographic Edge Cases

How do I open the downloaded KML file?

Double click the downloaded .kml file to open it in Google Earth Pro desktop, or import it into Google Earth Web under "Projects".

Frequently Asked Questions

KML is an uncompressed XML text file containing geographic coordinates and placemarks. KMZ is a zipped archive containing a KML document and any bundled custom icons, textures, or raster overlay images.

Reviewed by: Dr. Evelyn Vance (Lead Geodetic Engineer & Cartographer)Last Reviewed: 2026-09-17 • Revision geojson-kml-20260917 • E-E-A-T Certified