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Browser-based GIS workflow

Free GML Tools Online

Open an OGC Geography Markup Language file, inspect its features and attributes, check its coordinate reference system, or convert it into a format that is easier to use in web maps and desktop GIS.

Start here: Start with a .gml file or an XML document that contains valid GML features and geometry.

Suggested workflow

From file to usable GIS data

  1. 01

    Open the GML file

    Render its features and confirm that the geometry loads.

    Open the viewer →
  2. 02

    Inspect attributes

    Review feature properties and the dataset structure.

    Inspect GML →
  3. 03

    Check the CRS

    Identify projection metadata before converting coordinates.

    Detect CRS →
  4. 04

    Convert for the next tool

    Choose GeoJSON, GeoPackage, or Shapefile for delivery.

    Convert to GeoJSON →

Frequently asked questions

GML tools FAQ

What is a GML file?

GML, or Geography Markup Language, is an XML-based OGC standard for encoding geographic features, geometry, attributes, and coordinate reference information.

Can I convert GML to GeoJSON online?

Yes. Open the GML to GeoJSON converter to create a web-friendly GeoJSON layer directly in your browser.

Are GML tools private?

GeoDataViewer processes GML files locally in your browser. Your data is not uploaded to a server for viewing, CRS detection, or conversion.