Convert KML to GML

Convert KML (.kml) to GML (.gml) online for free. Fast, accurate geospatial format conversion with CRS reprojection.

Ready to convert?

Upload your KML file and get GML output in seconds.

About KML

Keyhole Markup Language (KML) is an XML-based format for displaying geographic data in Earth browsers like Google Earth. It supports styling, icons, and 3D features.

Extensions: .kml
Software: Google Earth, Google Maps, QGIS, ArcGIS, Cesium
Limitations: Requires WGS 84 (EPSG:4326). Can become very large for complex datasets. Limited attribute handling.

About GML

Geography Markup Language (GML) is an OGC XML-based format for expressing geographic features. It is often used for data exchange between government agencies and in INSPIRE-compliant systems.

Extensions: .gml
Software: QGIS, ArcGIS, GeoServer, Deegree, GDAL/OGR
Limitations: Verbose XML format — large file sizes. Complex schema definitions. Slower to read/write than binary formats.

How to Convert KML to GML

  • Upload your KML file (.kml)
  • Review detected layers, features, and coordinate system
  • Select GML as your output format
  • Choose a target coordinate reference system (optional)
  • Click Convert and download your GML file

Frequently Asked Questions

How do I convert KML to GML?

Upload your KML file to ConvertGeoData, review the detected data, select GML as the output format, and click Convert. Your converted file will be ready to download in seconds.

Is the KML to GML conversion free?

Yes! ConvertGeoData offers free conversions for all users. No account required for basic conversions. Sign up for a Pro or Business plan for higher limits.

Can I change the coordinate system during conversion?

Yes. ConvertGeoData automatically detects your source CRS and lets you reproject to any EPSG coordinate reference system during conversion.

What software can open GML files?

GML files can be opened with QGIS, ArcGIS, GeoServer, Deegree and more.

Convert KML to GML Now

No installation required. Works in your browser.