Validate HL7v2 messages against the HL7 grammar (HL7 abstract message syntax) using HL7v2 Validator — an online interactive tool that requires no registration or installation.
FHIR Viewer is an online tool for browsing FHIR stores. A FHIR store is a service that exposes a FHIR API and provides access to FHIR resources such as Patients, Observations, and more.