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Convert GEOJSON to KML Online - Free & Fast

Convert GEOJSON files to KML online for free. High-quality conversion with no registration required.

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.geojson,.GEOJSON (max 100MB)

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About GEOJSON and KML

GEOJSON

GeoJSON is an open standard format that encodes geographic features as JSON objects, supporting points, lines, polygons, and their properties. It is widely used in web mapping libraries like Leaflet and Mapbox for its simplicity and developer-friendly structure.

KML

KML (Keyhole Markup Language) is an XML-based format designed for displaying geographic data in Earth browsers like Google Earth and ArcGIS Earth. It supports rich styling, 3D overlays, and animated tours that go beyond what raw GeoJSON provides.

Common Use Cases

  • Share GeoJSON web-mapping data with stakeholders who use Google Earth for visualization.
  • Add custom icons, polygons, and 3D building extrusions for a client presentation.
  • Publish a guided virtual flyover tour of a construction or development site.
  • Distribute geographic datasets to non-technical users via Google Earth.

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from web mapping, geospatial apis, data interchange to google earth visualization, geographical overlays, placemarks
File Size~1KB to 50MB for complex overlays after conversion

FAQs

Is converting GEOJSON to KML free?

Yes, GoConvertFile offers free conversion of GEOJSON to KML for files up to 100MB. No registration required.

How long does it take to convert GEOJSON to KML?

Most GEOJSON to KML conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is KML best used for?

KML is ideal for google earth visualization, geographical overlays, placemarks. Keyhole Markup Language - XML-based geographic annotation format for Google Earth

What file size should I expect after converting GEOJSON to KML?

File size after GEOJSON to KML conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

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What is GEOJSON?

GeoJSON is the standard format for web-based geographic data, encoding points, lines, polygons, and feature collections in JavaScript Object Notation.

What is KML?

KML (Keyhole Markup Language) is Google Earth's native format for geographic annotation, supporting placemarks, polygons, 3D models, and image overlays.

When Should You Use GEOJSON vs KML?

Use GEOJSON When...

Reach for GEOJSON when your priority is web mapping, geospatial apis, data interchange — its uncompromising quality ensures every detail is preserved.

Use KML When...

Reach for KML when your priority is google earth visualization, geographical overlays, placemarks — its uncompromising quality ensures every detail is preserved.

GEOJSON vs KML: Key Differences

  • •GEOJSON and KML diverge on compression: lossless compression for the source, lossless compression for the target.
  • •Neither format changes compression philosophy — both are lossless compression — so any size differences are due to encoding efficiency, not a shift in quality approach.
  • •Transparency: N/A
  • •Storage footprint: 1KB to 100MB for large datasets for GEOJSON vs 1KB to 50MB for complex overlays for KML.
  • •Primary audience: GEOJSON is built for web mapping, geospatial apis, data interchange scenarios, while KML focuses on google earth visualization, geographical overlays, placemarks — pick the format that matches your output requirement.

Advantages of GEOJSON

  • ✓The lossless nature of GEOJSON means file sizes stay reasonable while handling Web mapping, geospatial APIs, data interchange efficiently.
  • ✓From mobile devices to enterprise servers, GEOJSON is recognized and supported everywhere.
  • ✓The trade-off for GEOJSON's perfection is larger files — but for archival work, it is worth every megabyte.
  • ✓GEOJSON is a first-class citizen in all major software ecosystems, from creative suites to development environments.

Advantages of KML

  • ✓KML uses lossless compression tailored for Google Earth visualization, geographical overlays, placemarks.
  • ✓KML is supported natively on virtually every device, browser, and operating system.
  • ✓KML files are bit-for-bit perfect, preserving every pixel and sample for professional work.
  • ✓KML integrates seamlessly with all major creative tools and workflows.

Common Use Cases for GEOJSON to KML Conversion

Industry Applications

Best Practices for GEOJSON to KML Conversion

  • →When converting GEOJSON to KML: confirm the coordinate reference system (CRS / projection) is preserved or explicitly reprojected
  • →Keep attribute tables and feature metadata intact — KML should retain all fields from GEOJSON
  • →Check geometry types (point, line, polygon) map cleanly between the two formats
  • →Verify that z/elevation values and topology survive the conversion when working with terrain data
  • →Always keep a backup of your original files before converting
  • →Choose the appropriate quality settings for your specific use case

Troubleshooting GEOJSON to KML Conversion

  • !KML features land in the wrong place after GEOJSON to KML → verify the CRS/projection; mismatched coordinate systems shift geometry
  • !Attribute columns missing in KML → some GIS formats have field name length or type limits; rename or cast columns first
  • !GEOJSON to KML drops the z/elevation dimension → pick a target format that supports 3D geometry
  • !KML file won't open in your GIS app → confirm the format version and any required sidecar files (e.g. .prj, .shx) are present

Related GIS / Geospatial Converters

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GEOJSON → GML
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GEOJSON → TOPOJSON
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GEOJSON → WKT
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GEOJSON → GPKG
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Convert Other Formats to KML

SHP → KML
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GPX → KML
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GML → KML
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TOPOJSON → KML
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WKT → KML
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GPKG → KML
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All GIS / Geospatial Formats

SHPGPXGEOJSONGMLTOPOJSONWKTGPKGMIFTABE00DGNGDBBNAMID
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Convert to KML →Convert from GEOJSON →