GeoJSON is a lightweight format for web apps and APIs, KML is Google Earth's format for visualization. Both store geodata but for different purposes.
| Criteria | GeoJSON | KML |
|---|---|---|
| Web applications | ✓ | ✗ |
| Google Earth | ✗ | ✓ |
| JSON compatibility | ✓ | ✗ |
| Styling | ✗ | ✓ |
| Easy to parse | ✓ | ✗ |
For Leaflet, Mapbox, OpenLayers, REST API, Python/JS processing.
For Google Earth, presentations, rich styled visualization.