FHIR Validator

The online FHIR Validator analyzes a FHIR resource payload (JSON or XML) and validates it against the selected FHIR version (R4 or R5) and optional profiles. The tool returns a structured set of issues with severity, location, and descriptive details to guide corrections.
Conceptually, validation proceeds in stages: syntax checks ensure valid JSON or XML; schema and resource constraints verify required elements and value patterns; then profile conformance validates constraints defined by provided profiles and extensions. When inputs are bundles, bundle-level checks verify overall consistency. If multiple issues are found, results are aggregated into a standardized result payload compatible with HL7's OperationOutcome style.
Who benefits are health IT developers, interoperability engineers, data engineers, and QA teams integrating or exchanging health data. Unique value includes precise location data for issues, support for multiple profiles, and the ability to run in CI pipelines or offline environments for privacy. Core features include: resource-type and version input; content parsing; optional profile validation; bundle checks; and detailed issue reporting. Use cases include pre-deployment validation, compliance testing for data exchanges, and validation as part of automated data pipelines.