Browse HL7 v2, v3/CDA & FHIR specs — and parse and validate real messages.
HL7®, FHIR®, and CDA® are registered trademarks of Health Level Seven International. HL7 Workbench is an independent tool and is not affiliated with, endorsed by, or certified by HL7 International. Specification content is used under CC BY 4.0.
Message Parser
Free accountParse and validate HL7 v2 messages with real-time schema validation, terminology services, and a powerful segment editor.
All parsing happens in your browser. PHI never leaves it.
HL7 v2 Specifications
Each version includes segments, data types, tables, events, message structures, and specification documentation.
FHIR Specification Browser
HL7 v3 / CDA
The RIM-based standard. Explore domains, interactions, static models, data types and vocabulary, plus Clinical Document Architecture.
Global Resources
Version-independent reference data
Your workspace, anywhere
Your free Saga account unlocks the parser and builder — and keeps your saved messages, profiles, and preferences in sync across every browser and device.
Free forever · No credit card
Inside the Parser
Real screenshots of the workspace — click any pane to see it full size
Explore What's Inside
Discover the tools and capabilities behind each area
Who Uses HL7 Workbench
Built for healthcare integration professionals at every stage of the workflow
Interface Development
Build and test HL7 interfaces faster with instant message parsing, field-level validation, and spec lookups without leaving the browser. Pairs naturally with Mirth Connect and other healthcare interoperability workflows.
Troubleshooting
Diagnose integration failures by parsing production messages, identifying malformed segments, and validating against the correct HL7 version spec. Everything runs client-side, so PHI never leaves your browser.
Training & Education
Learn HL7 v2 message structures hands-on. Browse specifications, explore real message examples, and understand segment relationships interactively across all 14 versions.
Frequently Asked Questions
HL7 v2 is the most widely deployed healthcare messaging standard, used by hospitals and health systems worldwide to exchange clinical, administrative, and financial data between systems like EHRs, lab systems, and pharmacy applications.
Yes. Message parsing, validation, and formatting happen entirely in your browser, and your messages are never uploaded. When terminology validation is enabled (the default), individual vocabulary codes from coded fields are sent to the terminology server as lookup queries — you can turn that off, or enable offline mode for fully air-gapped usage. PHI masking features let you redact or anonymize sensitive fields.
Yes. HL7 Workbench validates messages in real time against the selected HL7 v2 specification, with conformance checking, error reporting, and segment-level diagnostics. It all happens in the browser, with no upload required.
No. HL7 Workbench runs entirely in the browser on any operating system, with nothing to download or install. It pairs well with Mirth Connect and other HL7 integration workflows.
HL7 Workbench supports all 14 published versions of HL7 v2: from v2.1 (1992) through v2.9 (2019), including point releases like v2.5.1, v2.7.1, v2.8.1, and v2.8.2. Each version has segment, data type, table, event, and message structure definitions.
Yes. Enable offline mode in the parser toolbar to cache the current version's schema locally. In offline mode, schema validation works without an API connection. Terminology validation requires a server connection.
Over 110 FHIR IGs are included, covering major US healthcare programs: US Core, Da Vinci (CDex, PDex, PAS, DTR, CRD), mCODE, IPA, C-CDA on FHIR, SMART App Launch, Bulk Data, and many more. Each IG includes profiles, extensions, value sets, search parameters, and capability statements.
The terminology server integrates 129 OMOP-based vocabularies including LOINC, SNOMED CT, ICD-10, RxNorm, and NDC. During message validation, coded values are checked against their declared coding system tables, including HL7 THO (terminology.hl7.org) mappings.
Yes, HL7 Workbench is free for healthcare developers, integration engineers, and anyone working with HL7 standards. The specification data is sourced from publicly available HL7 International publications.
Use the feedback mechanisms available in the application, or contact the development team at SAGA. Feature requests and bug reports help improve the tool for the entire healthcare integration community.