Online Radio in Kodular is a feature that allows users to listen to live Quran recitations streamed over the internet. It uses a media player component to play audio directly from an online streaming URL without requiring users to download the files. This feature provides continuous access to recitations from various Qaris, making the application more practical, lightweight, and convenient for users with an internet connection. By integrating an online radio feature, developers can enhance the application's functionality while offering a simple and user-friendly listening experience.