GeoJSON Validator & Viewer
Validate GeoJSON syntax and structure, inspect features and geometry types, and preview your geographic data on an interactive map directly in your browser.
Validate or View GeoJSON
Paste GeoJSON below or upload a file from your computer.
Map Preview
Valid geographic features will appear here after validation.
Validate GeoJSON
Paste GeoJSON or upload a .geojson or .json file to check whether the JSON syntax is valid and whether the data follows common GeoJSON structures such as FeatureCollection, Feature, Point, LineString and Polygon.
View GeoJSON on a Map
Valid geographic features are displayed on an interactive map, making it easier to inspect locations, lines and polygon boundaries before using the data in GIS software or another application.
Browser-Based Processing
GeoJSON validation and preview are performed in your browser. This makes the tool useful for quickly checking GIS data without opening desktop mapping software.
What is GeoJSON?
GeoJSON is a JSON-based format used to represent geographic features such as points, lines and polygons together with their properties. It is commonly used in web maps, GIS applications, APIs and spatial data workflows.
How to use the GeoJSON Validator & Viewer
- Paste GeoJSON into the editor or upload a GeoJSON file.
- Select Validate & View.
- Review any syntax or structural validation messages.
- Inspect valid geographic features on the interactive map.
- Download a formatted copy if you want to save the result.
Common Uses & Real-Life Examples
A GeoJSON validator and viewer is useful whenever you need to check spatial data before using it in a web map, GIS application, dashboard, API or data workflow.
Check a GeoJSON file before publishing a web map
A developer preparing boundaries or locations for an online map can validate the GeoJSON first to make sure the file is structured correctly and the features appear in the expected location.
Inspect administrative boundaries
A GIS analyst can open province, district or municipal boundaries in GeoJSON format and visually confirm that polygons are present and correctly positioned before further analysis.
Verify GPS or survey locations
Survey or field teams can check GeoJSON point data containing schools, health facilities, project sites or monitoring locations and confirm that the coordinates plot in the correct area.
Troubleshoot geographic data from an API
When an API returns geographic data, the output can be pasted into the validator to check whether it is valid GeoJSON and identify the geometry types included in the response.
Review data before converting formats
Before converting GeoJSON to another spatial format, users can validate the source data first to reduce the chance of carrying errors into the next step of the workflow.
Inspect GIS data without desktop software
Someone who receives a GeoJSON file can preview it directly in the browser without first opening QGIS, ArcGIS or another desktop GIS application.