How to view and inspect a GeoJSON file online?

Drag and drop your .geojson or .json file directly onto the map canvas or paste the raw JSON text into the 'Add Geometry' input modal. Spatial-Sandbox parses and renders all Feature and FeatureCollection elements.

What coordinate system does GeoJSON use?

According to RFC 7946 specifications, GeoJSON coordinates must always use the WGS84 (EPSG:4326) datum in [longitude, latitude] decimal degree order.

Can I convert GeoJSON to WKT (Well-Known Text)?

Yes. Once your GeoJSON is loaded, click the 'Export' button on the sidebar layer or choose 'Export All' to download the equivalent WKT geometries.

CRS / Projection

Enter an EPSG code to set the input CRS of your geometry data (e.g. EPSG:3857 for Web Mercator, EPSG:27700 for British National Grid). Geometries are automatically reprojected to WGS84 (EPSG:4326) for display on the map.

Free Online GeoJSON Viewer & Visualizer

Render and style GeoJSON geometries, Features, and FeatureCollections on interactive maps. Drag and drop .geojson or .json files, inspect attribute tables, measure area/distances with Turf.js, and export back to WKT, PostGIS WKB, or BBOX — 100% client-side with no installation.

Supported GeoJSON Types & Objects

Spatial-Sandbox supports all standard RFC 7946 GeoJSON objects with automatic geometry detection:

Point MultiPoint LineString MultiLineString Polygon MultiPolygon GeometryCollection Feature FeatureCollection

No Software Download Needed — Instant In-Browser GIS & File Export

Looking for a GeoJSON viewer download or desktop GIS app? Spatial-Sandbox gives you full geospatial visualization and measurement directly in your browser with zero installation. You can also edit, convert, and download exported GeoJSON (.geojson) and WKT files directly to your computer anytime.

Copyable GeoJSON Examples

Click Load in Map to test any of these GeoJSON snippets immediately:

{"type":"Point","coordinates":[2.2945,48.8584]}

{"type":"LineString","coordinates":[[-122.4786,37.8100],[-122.4783,37.8199],[-122.4780,37.8300]]}

{"type":"Feature","geometry":{"type":"Polygon","coordinates":[[[-73.9731,40.7644],[-73.9579,40.7972],[-73.9818,40.8005],[-73.9819,40.7681],[-73.9731,40.7644]]]},"properties":{"name":"Central Park, New York"}}

Online WKT Viewer & Plotter →

Switch to WKT mode for visualizing Well-Known Text strings and PostGIS spatial queries.

WKT Syntax Validator →

Validate geometry syntax, check coordinate order, and verify polygon boundary closure.

In-Depth GeoJSON Architecture & Standards Guide

Need to understand RFC 7946 specifications, right-hand rule winding order, coordinate precision optimization, or GeoJSON vs TopoJSON? Read our comprehensive technical guide:

👉 GeoJSON Specification Guide (RFC 7946): Structure & Best Practices →