Online reprojection for Lambert 93 (France RGF93) (EPSG:2154): import CSV/TXT, pick a target CRS (WGS84, UTM…) and export results. Local browser processing.
Enter X and Y: the result updates as you type.
Lambert-93 is the official reference system for mainland France. It is based on RGF93 and uses a conformal conic projection designed for the country’s geographic extent.
Use EPSG:2154 for French topographic surveys, construction plans, cadastral data, and exchanges with GIS or CAD software. Coordinates are expressed in metres, making distance and area calculations straightforward.
Make sure the dataset covers mainland France and does not mix longitude/latitude with projected coordinates. Overseas territories normally require a different CRS.