TopoJSON Viewer

Upload and visualize TopoJSON files on an interactive map

🔒 All processing happens locally in your browser. Your files never leave your device.

TopoJSON encodes topology rather than explicit coordinates, making it compact but not directly renderable by most mapping libraries — viewing the file here converts the topology to a Leaflet-compatible map display.

→ Full guide: Viewer Tools

Convert TopoJSON

More Viewers

Grid Tools

Bounding Box Tools

Measurement Tools

Buffer Tools

Dissolve Tools

Centroid Tools

Simplification Tools

Data Inspection

Feature Selection Tools

Filter by Attribute Tools

Convex Hull Tools

Polygon to Line Tools

Line to Polygon Tools

Explode to Points Tools

Flatten Multi-Geometry Tools

Combine Features Tools

Spatial Operations

Raster Operations

Rasterization Tools

Reprojection Tools

Coordinate Conversion Tools