FHIR Viewer is an online tool for inspecting the contents of FHIR stores (FHIR-enabled servers).
FHIR (Fast Healthcare Interoperability Resources) is a specification for exchanging healthcare data. It aims to provide a modern and developer-friendly way to represent and communicate information about patients, claims, medications, and so on.
A FHIR-enable server exposes so-called FHIR resources, such as Appointment resources, Patient resources, Organization resources, and more.