Convert GML to KMZ

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

Ready to convert?

Upload your GML file and get KMZ output in seconds.

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.

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.

How to Convert GML to KMZ

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

Frequently Asked Questions

How do I convert GML to KMZ?

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

Is the GML to KMZ 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 KMZ files?

KMZ files can be opened with Google Earth, Google Maps, QGIS, ArcGIS and more.

Does KMZ support different coordinate systems?

KMZ requires EPSG:4326. ConvertGeoData automatically reprojects your data to the correct CRS.

Convert GML to KMZ Now

No installation required. Works in your browser.