Convert FlatGeobuf to GML Online — Free & Instant
Converting FlatGeobuf to GML makes your cloud-native data compatible with OGC WFS services and government data portals that mandate GML delivery. GML is the XML standard required for INSPIRE-compliant datasets and WFS service responses.
File converter
When to convert FlatGeobuf to GML
- Publishing FlatGeobuf data via a WFS service in GML format
- Submitting cloud GIS data to government portals requiring GML
How to convert FlatGeobuf to GML
- 1
Upload your FlatGeobuf
Drop your .fgb file on the upload zone.
- 2
Select GML
Click GML in the format panel.
- 3
Download and use
Load into GeoServer or submit to a GML-accepting portal.
About FlatGeobuf
FlatGeobuf is a modern, high-performance binary format for geospatial vector data, designed for efficient streaming and cloud-native workflows. Based on FlatBuffers, it supports random access via HTTP range requests, making it ideal for serving large datasets directly from object storage like S3 without a tile server. FlatGeobuf is an OGC Community Standard and is supported by GDAL 3.1+, QGIS, Mapbox, and the GeoJSON ecosystem. Its compact binary encoding is significantly faster to parse than GeoJSON for large datasets.
Strengths
- +Extremely fast read/write — binary encoding
- +Supports HTTP range requests for cloud-native access
- +OGC Community Standard
- +Compact — much smaller than equivalent GeoJSON
About GML
Geography Markup Language (GML) is an XML-based OGC standard for encoding geographic features. It is the mandatory format for the EU INSPIRE directive and is commonly used in Web Feature Services (WFS) to deliver geospatial data over the web. GML files are highly interoperable across GIS platforms and are natively supported by GDAL, QGIS, ArcGIS, and GeoServer. GML can represent complex geometries, coordinate reference systems, and rich attribute schemas, making it the format of choice for authoritative government and infrastructure datasets.
Strengths
- +OGC standard — maximum interoperability
- +Mandatory for EU INSPIRE datasets
- +Supports complex geometries and CRS metadata
- +Native support in QGIS, ArcGIS, and GeoServer
Frequently asked questions
Q.Are FlatGeobuf attributes preserved in GML?
Yes. All feature attributes are preserved as GML property elements.