Elastic App Search Reference UI is an open-source developer tool integrated into the App Search dashboard, designed to facilitate the creation and testing of robust search experiences. Written in React, it provides a dynamic search preview where developers can experiment with features like facets, pagination, and sorting to improve search relevance, which is crucial for fulfilling user and business needs. The tool supports developers by generating a quality design and developmental foundation for new search interfaces, allowing them to configure fields such as title, facet, sort, and URL fields for customized search experiences. Users can further refine their search results using interactive tools like faceting and sorting, enhancing the overall search experience. The Reference UI can be downloaded and customized, enabling developers to run a local version that is ready to fork and build upon, with the potential to inspire innovative search solutions within the community.