FHIR JSON Prettifier with Syntax Highlighting

Format and beautify FHIR JSON with syntax highlighting. Free, instant, fully client-side prettifier.

• Format and beautify messy FHIR JSON with syntax highlighting.
• Detects malformed JSON and points to the offending line.

FHIR Toolbox is a free, privacy-first collection of HL7 FHIR utilities by Omindra Labs. Every tool performs zero-server processing — your health data never leaves your device.