GeoJSON to KML: Real Use Cases and Workflows

People convert GeoJSON to KML whenever web-map data needs to be seen in Google Earth or Google My Maps — GIS analysts building 3D presentations, developers debugging API responses, and drone or field teams handing off survey data to stakeholders who live in Google Earth, not a code editor. The scenarios below show how the conversion fits into real work.

GIS analysts presenting web-map data

A city planning analyst has zoning boundaries stored as a GeoJSON FeatureCollection from a web GIS. The stakeholders reviewing them do not use QGIS — they want to fly over the proposed zones in Google Earth's 3D terrain. The analyst pastes the FeatureCollection, converts to KML, and each zone arrives as a labelled placemark polygon with its description intact. Polygons with holes (a park inside a district, say) render correctly because inner rings map to KML boundaries. Five minutes, no desktop GIS export dialog.

Developers debugging geospatial APIs

A backend developer is building an endpoint that returns store locations as GeoJSON. Something looks off — a few points seem misplaced. Rather than squint at raw coordinate arrays, they paste the API response into the converter and open the KML in Google Earth to see where each point actually lands. Visual inspection instantly reveals a lat/lon swap or a decimal-place error that would have taken far longer to spot in JSON.

Drone and survey teams handing off deliverables

A drone mapping crew captures field boundaries and asset locations, exported as GeoJSON from their flight-planning software. The client asked for something they can open on any laptop. The crew converts to KML, and the client double-clicks the file to explore the surveyed parcels in Google Earth — no GIS licence required. Because conversion is fully local, the unreleased survey data never touches a third-party server, which matters for confidential sites.

Which workflow fits you?

A quick worked example

Imagine a FeatureCollection with three delivery-hub polygons, each carrying a name and a description of its coverage area. After conversion, opening the KML in Google Earth shows three named placemarks in the Places panel; clicking one pops an info balloon with the coverage text. Drag the file into Google My Maps instead and the same hubs become an editable, shareable web map for the wider team. One GeoJSON source, two audiences, no re-authoring.

Try the GeoJSON to KML Converter — free and 100% in your browser.

Frequently asked questions

Can I use the output in Google My Maps, not just Google Earth?

Yes. KML imports directly into Google My Maps as well as Google Earth, so the same converted file works whether your audience wants a 3D fly-through or an editable shared web map.

Is converting a good way to debug misplaced points from an API?

It is one of the fastest. Seeing your GeoJSON on a real map exposes coordinate swaps and precision errors that are nearly invisible when you are reading raw JSON arrays.

Will confidential survey data stay private?

Yes. Parsing and KML generation happen entirely in your browser, so proprietary boundaries and unreleased survey results never leave your device.

Do multi-geometry features from web maps convert cleanly?

Yes. MultiPoint, MultiLineString, MultiPolygon and GeometryCollection are all supported, so clustered or grouped features from a web GIS come through intact.

Related free tools

• KML to GeoJSON Converter — bring KML data back into a web-map workflow.
• GPX to KML Converter — convert GPS device tracks for Google Earth.
• JSON Formatter — inspect and tidy a GeoJSON response.
• KML Polygon Generator — build KML polygons from scratch.

Built by ByteVancer

ByteTools is a free product of ByteVancer, a software and web development studio building web apps, SaaS and custom software, including mapping and data tooling. If your team needs a custom geospatial product, explore what ByteVancer can build.