GeoJSON Reprojector
Reproject every GeoJSON coordinate between explicit source and target CRS definitions while preserving properties and extra dimensions.
Input
Leave Source CRS blank to use explicit input metadata. The source CRS is never inferred from coordinate magnitude and must be supplied when metadata is absent.
Review these warnings
GeoJSON
Map preview
Understanding GeoJSON Reprojector
Coordinate systems, order and units
Reproject every GeoJSON coordinate between explicit source and target CRS definitions while preserving properties and extra dimensions.
GeoJSON Reprojector depends on knowing how coordinates are expressed. Geographic coordinates commonly use WGS84 longitude and latitude, while projected systems use linear units and a defined datum and projection.
How to verify the coordinates
Leave Source CRS blank to use explicit input metadata. The source CRS is never inferred from coordinate magnitude and must be supplied when metadata is absent.
To verify GeoJSON Reprojector, spot-check a known place, confirm axis order and verify the expected unit and CRS. A numerically valid coordinate can still be geographically wrong when those assumptions are incorrect.