Convert FlatGeobuf to KML

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

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Upload your FlatGeobuf file and get KML output in seconds.

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About FlatGeobuf

FlatGeobuf is a performant binary encoding for geographic data based on FlatBuffers. It supports streaming and random access for fast partial reads.

Extensions: .fgb

Software: QGIS, GDAL/OGR, Leaflet, OpenLayers, GeoServer

Limitations: Relatively new format with limited support in older software. Single layer per file.

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.

How to Convert FlatGeobuf to KML

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

Frequently Asked Questions

How do I convert FlatGeobuf to KML?

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

Is the FlatGeobuf to KML 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 KML files?

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

Does KML support different coordinate systems?

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