In this section, we will present two web apps for exploring the skymaps of the localization regions of gravitational-wave events published by the LVK (LIGO–Virgo–KAGRA) collaboration. After an overview of the interfaces and key features, we will show how to reproduce the key operations in a Jupyter Notebook (Python), integrating Aladin Desktop and TOPCAT and referencing the main IVOA standards. We will conclude with examples of outreach applications.