Knowledge Table is an open-source toolkit designed to streamline the process of extracting and exploring structured data from unstructured documents. It allows users to create structured knowledge representations, such as tables and charts, through a natural language query interface. The toolkit features customizable extraction rules, finely-tuned formatting options, and data provenance displayed through the UI, adapting to a variety of use cases. Its goal is to provide business users with a familiar spreadsheet-like interface while offering developers a flexible and highly configurable backend, ensuring seamless integration with existing Retrieval-Augmented Generation (RAG) workflows.