KML to GeoJSON Converter
Convert a Google Earth KML file to GeoJSON for web maps, Leaflet, Mapbox and GIS.
Complete the security check to begin
About Converting KML to GeoJSON
KML is the XML format Google Earth introduced for describing points, paths, polygons and overlays on a map. It became an Open Geospatial Consortium standard in 2008 and is now read by most mapping software. When you need to move away from KML, the usual reason is simple: verbose — large datasets produce very big files.
Converting your KML map file to GeoJSON solves that. GeoJSON encodes geographic features as ordinary JSON, standardised as RFC 7946. Because any language that parses JSON can read it, it has become the default format for web maps and geospatial APIs. In practice you gain parsed natively by every web language and mapping library and arbitrary attribute data per feature. PrivConvert runs the whole KML-to-GeoJSON conversion in server memory and deletes your file the instant the GeoJSON is ready — nothing is stored, logged or reused.
When this conversion helps
- You need parsed natively by every web language and mapping library
- You need arbitrary attribute data per feature
- You need standardised on WGS 84, removing projection ambiguity
- Sharing a KML map file with someone whose software expects GeoJSON
Tips for best results
- After converting, open the GeoJSON and skim the formatting — complex layouts occasionally need a small touch-up.
- Files up to 250 MB are supported, and you can batch-convert several KML files at once; each is processed privately and deleted immediately.
How to Convert KML to GeoJSON Online
Here is how a KML → GeoJSON conversion works on PrivConvert, from start to finish. What you gain with GeoJSON: parsed natively by every web language and mapping library.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from KML to GeoJSON starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
What makes this KML-to-GeoJSON converter different
Privacy here is not a checkbox. Every KML-to-GeoJSON conversion is engineered so your data never lingers, leaks or gets reused.
Runs in any modern browser on Windows, macOS, Linux, Android and iOS — no install, plugin or desktop software needed.
Each job runs in an isolated in-memory sandbox, so most conversions finish in seconds instead of waiting in a queue.
We never keep a copy. Once your GeoJSON is delivered, both the original and the result are gone — there is nothing left to leak or misuse.
Every conversion runs in its own locked-down process with no network access, so files can never leak or interfere with one another.
KML vs GeoJSON - Format Comparison
| Feature | KML | GeoJSON |
|---|---|---|
| File extension | .kml | .geojson |
| Full name | Keyhole Markup Language | GeoJSON |
| Introduced | 2004 | 2008 |
| Encoding | Text | Text |
| Editable | Yes | Yes |
| Open standard | Yes | Yes |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
Why people pick PrivConvert for GeoJSON
Thousands of people trust PrivConvert with their files because privacy here is structural — enforced by how the service runs, not just promised.