Jellyfin is an open-source media server software that allows users to organize, manage, and stream their personal media collections. It supports various media formats and can be accessed from multiple devices, including smartphones, tablets, and smart TVs. Users can create libraries for movies, TV shows, music, and photos, making it easy to enjoy their content anywhere. One of the key features of Jellyfin is its ability to transcode media on-the-fly, ensuring compatibility with different devices and network conditions. As a community-driven project, Jellyfin is continually updated and improved by contributors, providing a free alternative to other media server solutions like Plex and Emby.