Finds, extracts and displays medical terms from blog posts. MedCrawler is a data mining tool for analyzing user-generated blog posts aiming to find modern ‘traditional’ medicine or home remedies. It searches user-generated blog posts and analyzes them for correlations between medically relevant terms. It offers a method to include data from a wide variety of sources and authors, and includes automated information extraction and representation. MedCrawler can be used as a supplementary tool to support sample library design for screening campaigns or to provide a quick overview over modern folklore.