This dataset contains the coding of content analysis of a sample of hoaxes debunked by three fact checkers in Spain (N = 533): Maldita.es (N = 327), Newtral (N = 143), and EFE Verifica (N = 63). Coding includes de following variables: 0. Subject of the hoax: science/health, politics/government, other. Platform used to spread the hoax: networks (in general), Twitter, Facebook, WhatsApp, Instagram, YouTube, and others. Formats used: text, audio, image, video, other. Geographical scope: local, national, international, unspecified/not applicable. Type of hoax: joke, exaggeration, decontextualization, deception. Topic of hoaxes related to science/health: scientific research, scientific policy and health management, advice issued to the public, and others. Topic of hoaxes related to scientific research: origin of the virus, transmissibility, fatality rate, treatments, vaccines, etc. Source type: anonymous, spoofed, fictitious, real. Non-anonymous sources: members of the public, business, government, professional, healthcare/science. Type of healthcare/science sources: researchers, international scientific organizations, national scientific organizations, health professionals, and others.