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What is this?

The FHIR Questionnaire Builder is a free, browser-based tool for authoring, importing, testing, and exporting HL7® FHIR® R4 Questionnaire resources — including the dynamic behaviour defined by the Structured Data Capture (SDC) implementation guide.

It runs entirely in your browser. There is no backend, no account required, and nothing is uploaded to a server unless you explicitly choose to (for example, cloud save or validating against an external FHIR server). It is served as static files from GitHub Pages.

What it does

  • Build a Questionnaire visually — groups, items, answer types, answer options, and value-set bindings.
  • Import & round-trip existing FHIR Questionnaire JSON (R4, with STU3 normalised on import and R5-only fields preserved), with a documented, transparent mapping.
  • Test the logic live — enableWhen / enableWhenExpression visibility, calculatedExpression / initialExpression chains, and FHIRPath constraints are evaluated in the browser against a patient context you choose.
  • Extract data — definition-based, Observation-based, and StructureMap-based extraction turn questionnaire answers into FHIR resources (a transaction Bundle) — all in the browser.
  • Translate a questionnaire into other languages and preview it per language.
  • Validate — a built-in validator plus optional external FHIR $validate.
  • Export clean FHIR JSON, or convert to/from a REDCap data dictionary.

What it is not

Being honest about the boundaries matters more than marketing:

  • It is not a FHIR server or a data store. It has no server-side API.
  • It is not an industrial SDC engine — it does not resolve profiles against a terminology server for licensed code systems, and it cannot resolve an external canonical StructureMap/CQL Library from a live FHIR server (only ones added as contained resources).
  • It is not designed for direct use by clinicians without FHIR knowledge. It deliberately surfaces FHIR concepts (linkId, extensions, FHIRPath) rather than hiding them — see Who it's for.

Why use it

  • Trustworthy round-trip. Every import ↔ export mapping is documented, and silent data loss is explicitly flagged.
  • A real logic runtime. You can actually see how enableWhen and calculated expressions behave, driven by patient presets — not just author fields blindly.
  • Zero friction. Open a URL, load a sample, start building. No install, no sign-up.

Next steps

  • Who it's for — is this the right tool for you?
  • Quick tour — build and test a questionnaire in five minutes.
  • Core Concepts — the FHIR ideas the builder is built around.