The tool provides the credible areas of gravitational-wave sky localizations issued by the LIGO-Virgo-KAGRA collaborations (LVK). The resulting credible area is encoded with the data-structures Multi Order Coverage map (MOC). MOC is a Virtual Observatory standard approved by the IVOA (International Virtual Observatory Alliance) to manage sky coverage. Each MOC is visualized in the Aladin Lite with various background image surveyes. The whole list and the image surveys are accessible by clicking the icon manage layers located at the top left. The MOC maps are created and manipulated with the WebAssembly library MOCWasm.