Free Online GML Viewer

Quick answer: Open GML files in a private browser-based GML file viewer. No upload, no install, and no server-side processing.

Prepare your file and check the result

Before opening

Keep the GML file and its coordinate reference information together. GML axis order can differ between schemas; check the srsName before interpreting coordinates.

Before sharing or converting

Confirm the feature count, geometry and a known location. If the map is displaced, check the source CRS and axis order before exporting.

Download a small GML example

Open this example in the tool above. Expect three synthetic points near London: West point, East point and North point. Coordinates span −0.13 to −0.12 longitude and 51.50 to 51.51 latitude. These are demonstration locations, not survey data.

Convert GML geometry to DXF →

How to open GML online

View Geography Markup Language (GML) files. Upload .gml files to visualize OGC GML features.

Privacy

Files are processed on your device in the browser. GeoDataViewer does not upload your datasets to a server for viewing.

Common issues

If a dataset uses multiple required sidecar files, make sure you provide the complete set together. For best results, keep all sidecars in one zip archive when applicable.

Related tools

Measure distances, areas, elevation, and radius circles using the tools menu, then come back to inspect your GML layer on the map.

What is GML?

GML is an OGC XML-based geospatial encoding used in standards-heavy exchange workflows where formal schemas and structured feature descriptions matter.

GML is designed for rigorous geospatial data exchange, especially in environments that value application schemas, XML tooling, and well-defined standards behavior.

That rigor makes GML powerful for formal interchange, but it also makes the format heavier and more verbose than many teams want for routine viewing, editing, or browser distribution.

What is GML used for?

Standards-driven exchange between government, enterprise, and regulated geospatial systems.
Workflows that depend on XML schemas and explicit feature structure.
Delivering complex datasets where formal interoperability matters more than lightweight handling.

Common use cases

National mapping, cadastral, infrastructure, and regulated data handoff workflows.
Data exchange packages tied to OGC-oriented services or schema contracts.
Converting formal XML geospatial exports into more practical working files for analysts.

Strengths

Strong fit for standards-oriented and schema-driven exchange.
XML structure can represent rich feature content in formal workflows.
Widely recognized in OGC-aligned environments.

Limitations

Verbose XML makes files heavier and harder to inspect manually than simpler formats.
Many day-to-day GIS users prefer lighter formats for editing and quick review.
Browser and consumer tooling usually need conversion before the data is practical to use.

File extensions and sidecar files

.gml

Main XML file containing geospatial features and schema-driven structure.

.xml

Generic XML extension sometimes used for GML-based content in broader data exchange systems.

XSD schema references

Supporting schema definitions may accompany GML workflows to formalize feature structure and validation.

Convert GML online

GML to GeoJSON

Open, preview, and convert GML locally in your browser.

GML to GeoPackage

Open, preview, and convert GML locally in your browser.

GML to ESRI Shapefile

Open, preview, and convert GML locally in your browser.

GML to CSV

Open, preview, and convert GML locally in your browser.

GML to AutoCAD DXF

Open, preview, and convert GML locally in your browser.

GML to FlatGeobuf

Open, preview, and convert GML locally in your browser.

GML to File Geodatabase

Open, preview, and convert GML locally in your browser.

GML to GeoRSS

Open, preview, and convert GML locally in your browser.

GML to GPX

Open, preview, and convert GML locally in your browser.

GML to JSON-FG

Open, preview, and convert GML locally in your browser.

GML to KML

Open, preview, and convert GML locally in your browser.

GML to MapInfo

Open, preview, and convert GML locally in your browser.

GML to MBTiles

Open, preview, and convert GML locally in your browser.

GML to Mapbox Vector Tiles

Open, preview, and convert GML locally in your browser.

GML to PMTiles

Open, preview, and convert GML locally in your browser.

GML to SpatiaLite / SQLite

Open, preview, and convert GML locally in your browser.

GML to Microsoft Excel

Open, preview, and convert GML locally in your browser.

Open GML without QGIS or ArcGIS

You do not need QGIS, ArcGIS Pro, ArcMap, or any desktop GIS software to open and inspect GML files. This page is a browser-based GML viewer: it loads your file locally, renders the geometry and attributes on an interactive map, and never uploads your data to a server. If you just need to look at a dataset, check coordinates, or share what you see, you can skip the desktop GIS install entirely.

✓ No installation — open GML directly in Chrome, Firefox, Edge, or Safari.
✓ No QGIS license, ArcGIS Pro subscription, or ArcMap setup required.
✓ Private by default — files are processed on your device, nothing is uploaded.
✓ Instant preview — drag a file in and see the map render in seconds.
✓ Good for one-off checks: a quick look at attributes, geometry, or extent before deciding whether to open the data in a full GIS.

If you later need advanced analysis, editing, or geoprocessing, you can still open the same GML file in QGIS (free and open source), ArcGIS Pro, ArcMap, or Global Mapper — but for viewing and quick checks, this online GML viewer is all you need.

GML Viewer FAQ

Why is GML still used if it is so verbose?

It remains useful in standards-driven environments where formal schemas, XML tooling, and explicit interoperability rules are more important than file compactness.

When should I convert GML to another format?

Convert it when the next step is web mapping, exploratory analysis, or desktop editing that does not benefit from XML-heavy structure.

Is GML a good web map delivery format?

Not usually. Teams typically convert GML into GeoJSON, GeoPackage, or tiles before using it in modern browser workflows.

Can I open GML without QGIS or ArcGIS?

Yes. This page is a free online GML viewer that runs entirely in your browser — no QGIS installation, no ArcGIS license, and no plugins. Just add your GML file and it is rendered locally on an interactive map.

Do I need ArcGIS to view GML files?

No. ArcGIS is one option for working with GML, but it is commercial software and overkill if you only need to view a file. GeoDataViewer opens GML in your browser for free, with no account and no upload, so you can inspect the data before deciding whether a full GIS is worth it.

Can I open GML without ArcGIS Pro or ArcMap?

Yes. ArcMap has been retired by Esri and ArcGIS Pro requires a paid subscription, but neither is needed to view GML files. This browser-based GML viewer opens your file locally for free — no ArcGIS Pro license, no ArcMap install, and no account required.

Is there a free GML viewer with no installation?

Yes — this page. GeoDataViewer is a completely free GML viewer that runs in your browser. There is nothing to install and nothing to download: open the page, add your GML file, and inspect the map and attributes immediately.

Is GeoDataViewer a QGIS alternative?

For viewing, inspecting, and converting GML files, yes — GeoDataViewer covers those needs entirely in the browser with zero setup. QGIS remains the better choice for deep analysis, geoprocessing, and large production workflows. The two complement each other: use this viewer for quick checks and QGIS when you need the full toolbox.