Large collections of symbolic music documents need efficient information retrieval tools. We introduce FACETS, a versatile tool for exploring and management of such collections. FACETS is a scalable and flexible content-based search engine, offering melodic and rhythmic querying modes. For improved navigation, a faceted interface orders the results, to reduce information overloading, and it may be used as a primary entry point in the tool. FACETS is available as a standalone Docker image and Github repository, aiming to help musicologists, composers, MIR researchers and the interested public.