File Conversion
Convert GeoJSON to GML online
Convert GeoJSON — the open, web-native JSON format read by Leaflet, Mapbox and virtually every modern GIS tool — into Geography Markup Language (GML), which is the OGC XML standard used by INSPIRE and many government open-data portals. Drop your GeoJSON file below, GML is already selected as the output, and download the result. Everything runs in your browser and the cloud; you never install anything.
Upload your file
Drag and drop it into the converter below — no account needed to start.
Convert in the cloud
MapGO detects the format and produces your download in seconds.
Download & keep it
Files are deleted automatically after 48 hours.
Files are deleted automatically after 48 hours. Your files are never shared.
Why convert GeoJSON to GML with MapGO?
Most online converters take one file and hand back one file. MapGO is built on a real geospatial engine, so a single upload can do more:
- Several outputs in one upload — tick GML and any other formats you need; every selected format is delivered from the same file.
- Files up to 5 GB — far beyond the browser-based converters that choke past a few hundred megabytes.
- Reproject while you convert — set a source and target EPSG code and the coordinate system is changed during the conversion, no second tool needed.
- Private by default — files are deleted automatically after 48 hours.
GeoJSON vs GML at a glance
| GeoJSON | GML | |
|---|---|---|
| Typical use | Web maps and APIs (Leaflet, Mapbox, D3); human-readable data in git | Government/INSPIRE open-data portals and OGC web services |
| Size on disk | Verbose plain text — the largest of the common formats, but gzips well | Very verbose XML |
| Attribute support | Flexible JSON properties — nesting and arrays allowed | Rich, schema-driven attribute definitions |
| Software support | Every modern GIS tool and every web mapping library | GDAL-based GIS tools; rarely opened directly |
| Web-friendliness | Excellent — the native format of web mapping | Poor — convert to GeoJSON or FlatGeobuf first |
Other ways to convert GeoJSON to GML
You don't need an online tool for this. If you have GDAL installed, one command does it:
ogr2ogr -f "GML" output.gml input.geojsonIn QGIS (free): open your GeoJSON via Layer → Add Layer, then right-click the layer → Export → Save Features As… and pick GML as the format.
The MapGO converter above is for when you don't want to install anything, need to convert to several formats at once, or are handling files too large for a desktop machine — drop the file and download the result.
GeoJSON to GML: frequently asked questions
Is the GeoJSON to GML converter free?
Yes — new accounts get free conversion credits to start, and every paid plan converts unlimited files within its size limit. There is nothing to install; the whole GeoJSON-to-GML conversion runs in the cloud.
Is my data kept private?
Conversion is fully automated and your file is never shared. Files are deleted automatically after 48 hours. Download your GML result and it's yours to keep.
What does the GML output contain?
You get a clean Geography Markup Language (GML) file with your geometry and attributes preserved, ready to open in the tools that read GML.
Does my GeoJSON need to be in WGS84?
The GeoJSON spec (RFC 7946) defines coordinates as WGS84 longitude/latitude, and that is how MapGO reads it by default. If your file uses a different coordinate system, set the source EPSG code in the converter and MapGO applies it before converting.
Which tools open the GML output?
GML is the OGC XML standard used by INSPIRE and government data portals; QGIS and anything GDAL-based opens it. It is verbose by design — if the goal is a web map rather than a compliance deliverable, GeoJSON or FlatGeobuf are the better targets.