Online coordinate converter from WGS 84 / Pseudo-Mercator (EPSG:3857) to WGS 84 (EPSG:4326). Enter your source coordinates and get the result instantly. All transformations happen in your browser — no data is sent to any server.
Converting from Web Mercator (EPSG:3857) back to WGS 84 (EPSG:4326) reverses the projection used by Google Maps, OpenStreetMap and almost every web tile service. The result is decimal degrees of longitude and latitude on the WGS 84 ellipsoid.
Both CRSs share the WGS 84 datum, so this is a pure projection inverse with no datum shift. The conversion is invertible to floating-point precision.
A common use case is extracting GPS-style coordinates from data that was authored or transmitted in Web Mercator — for example, click coordinates from a Leaflet/OpenLayers map, or features stored in a tile-aligned vector dataset.
The same transformation with common GIS tools and libraries:
from pyproj import Transformer
transformer = Transformer.from_crs("EPSG:3857", "EPSG:4326", always_xy=True)
x, y = transformer.transform(-73.9857, 40.7484)
print(x, y)projected system measured in linear units (typically metres) · Area of use: World - 85°S to 85°N
+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crsMore about EPSG:3857 →
geographic system using latitude and longitude on an ellipsoid · Area of use: World (by country)
+proj=longlat +datum=WGS84 +no_defs +type=crsMore about EPSG:4326 →