Convert KML to GeoJSON online
Upload a KML or KMZ, check it on the map, download a GeoJSON for your web map or code.
Why convert KML to GeoJSON here?
- KMZ files are unzipped for you.
- The folder of each placemark goes into a
layerproperty, its name intotext. - Extended data fields (Data and SimpleData) become their own properties.
- Standard GeoJSON in longitude/latitude: Leaflet, MapLibre, Mapbox, PostGIS and Python read it as is.
How it works
- UploadDrop your file, up to 50 MB. Nothing to install, no account.
- See it on the mapEvery layer drawn on a map in a minute or two. Click an object to see its attributes.
- Place & checkCoordinate system from the file, from the coordinate labels, by search or with 2 points. AI names the layers; you correct them.
- DownloadFiles under 1 MB are free (3 a day). Bigger files: one payment per conversion.
Technical details
| Input | KML or KMZ (Google Earth, My Maps, QGIS exports) |
|---|---|
| Output | GeoJSON FeatureCollection, longitude/latitude (EPSG:4326) |
| Max size | 50 MB |
| Coordinate systems | 8,000+ EPSG codes: UTM, State Plane, Lambert, Merchich, OSGB, RGF93… |
Going the other way? Convert GeoJSON to KML.
Pricing — pay per conversion, no subscription
| Preview | Free | Map preview and AI layer categories, any file up to 50 MB |
|---|---|---|
| Free download | Free | Files under 1 MB, 3 per day |
| CAD → GIS | $10 | Shapefile + KMZ, layer categories, altitudes linked, with Max AI: title block read, symbols found (manholes, valves…), plain-English report and plan cleanup |
| GIS → CAD | $10 | DXF or DWG R2000 |
| GIS → GIS | $5 | KML / KMZ / GeoJSON → Shapefile with its .prj, in metres (UTM) or the coordinate system you pick; Shapefile / GeoJSON → KMZ / KML for Google Earth; Shapefile / KML → GeoJSON; KML → CSV; KML ↔ GPX, GPX → Shapefile |
FAQ
How do I convert KML to GeoJSON?
Drop the KML or KMZ above, check it on the map, then download data.geojson.
Are styles kept?
The line and icon colour is kept as a color property (a CAD colour index). Icons and labels styles are not part of GeoJSON.
Does it work with Google My Maps exports?
Yes, export the map as KML or KMZ and upload it. Each layer of the map becomes a value of the layer property.
How much does it cost?
The map preview is free, files under 1 MB download for free (3 a day), bigger files are $5.
What happens to my files?
Your files are deleted after 24 hours and never used for AI training. They are only used to make your conversion.
Can I get a refund?
No: the free map preview is there so you can check the result before you pay. If a file doesn't open, e-mail us and we'll fix the conversion.
Paid downloads?
Paid downloads open in a few days. Until then files under 1 MB download for free, and Max AI is free to try.