Convert KMZ to GML

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

Ready to convert?

Upload your KMZ file and get GML output in seconds.

About KMZ

KMZ is a compressed (zipped) version of KML files. It packages the KML document along with any referenced images, icons, or overlays into a single archive.

Extensions: .kmz
Software: Google Earth, Google Maps, QGIS, ArcGIS
Limitations: Same as KML (WGS 84 only). Requires extraction to edit the underlying KML.

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 KMZ to GML

  • Upload your KMZ file (.kmz)
  • 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 KMZ to GML?

Upload your KMZ 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 KMZ 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 KMZ to GML Now

No installation required. Works in your browser.