HL7 Developer Toolkit

Phase 5 preview: tools are released in phases

HL7 Development and Troubleshooting, Simplified

Paste an HL7 v2 message and read it as structured segments, fields and components. Compare messages and prepare Mirth Connect snippets as those tools arrive. Made for the people who keep healthcare interfaces running.

Try HL7 Inspector Explore Features

No account needed for the Inspector preview. Use synthetic or de-identified data only.

Synthetic sample: ADT^A01HL7 v2.5.1
MSH|^~\&|SENDAPP|SENDFAC|RECVAPP|RECVFAC|20261010093000||ADT^A01^ADT_A01|MSG00001|P|2.5.1
EVN|A01|20261010093000
PID|1||000123^^^SENDFAC^MR||DOE^JANE^Q||19800101|F|||123 SAMPLE ST^^EXAMPLEVILLE^ZZ^00000^USA||^PRN^PH^^^555^0100
PV1|1|I|WARD1^101^A^SENDFAC||||1234^SAMPLE^DOCTOR^A
PID-5
Patient name: DOE^JANE^Q
PID-5.1
Family name: DOE
PV1-2
Patient class: I
Made-up data for illustration. No real patient information.

Readable at a glance

Segments, fields and components are split out, so you can find a value without counting pipes.

Made for troubleshooting

Designed around two questions: what did this interface actually send, and what changed between these messages?

Privacy-minded by default

Pasted messages are parsed in memory on this site's server and are not stored, logged or sent to third parties.

What the toolkit is for

Everything here works today and is labelled with how mature it is. Premium tools need a free account.

Message inspection Available

Break an HL7 v2 message into segments, fields, components and subcomponents using the delimiters declared in MSH.

Open the Inspector

Field navigation Preview

Read values by address, such as PID-5.1, and move between segments instead of counting delimiters.

Learn more

Message comparison Available

Put two messages side by side and see which segments and fields differ, with repeated segments compared by occurrence.

Open Message Diff

Mirth Connect helper tools Experimental

Illustrative field references and starter JavaScript for Mirth Connect transformers, plus HL7-to-JSON export.

See all tools

From a failing message to a lead

A typical troubleshooting session with the Inspector preview.

  1. Paste a message. Copy a synthetic or de-identified HL7 v2 message from a log or test tool.
  2. Read its structure. Open a segment to see each field and its components, labelled by address.
  3. Narrow it down. Check the message type, control ID and version in the summary, then look at the fields your interface depends on.

Proposed plans

These are proposed test prices, not final commitments. Checkout is not connected yet.

Free

Try every tool with a small monthly allowance.

$0/month

Proposed test price, not final

Create a free account
  • HL7 Message Inspector Preview
  • Messages up to 20 KB Preview
  • 5 message comparisons per month Preview
  • 10 HL7-to-JSON conversions per month Preview

See the full plan

Proposed core paid plan

Developer

For individual developers who use the tools every week.

$6.99/month

Proposed test price, not final

Ask about early access

Everything in Free, plus:

  • Messages up to 200 KB Preview
  • 200 message comparisons per month Preview
  • 500 HL7-to-JSON conversions per month Preview
  • 500 Mirth snippets per month (basic templates) Preview

See the full plan

Pro

For heavier workloads and larger interface projects.

$12.99/month

Proposed test price, not final

Ask about early access

Everything in Developer, plus:

  • Messages up to 1 MB Preview
  • Unlimited comparisons, with ignore rules Preview
  • Unlimited HL7-to-JSON conversions Preview
  • Unlimited Mirth snippets, full template set Preview

See the full plan

Compare plans in detail

Frequently asked questions

What is HL7 Developer Toolkit?

A set of browser-based tools for people who work with HL7 v2 messages: integration engineers, interface analysts and Mirth Connect developers. The goal is to make reading, navigating and troubleshooting messages faster. The tools are being released in phases, and this site shows what exists today and what is planned.

Is my message data uploaded to your servers?

Yes, to parse it. When you choose Inspect Message, the text is sent to this site's own server, parsed in memory and returned to your browser. It is not saved to a database or session, not written to application logs, and not sent to any third-party service. Ordinary web server logs may record request details such as time and IP address. Please use synthetic or properly de-identified messages only, and never real patient data.

Does the Inspector validate messages or certify conformance?

No. The preview splits a message into segments, fields, components and subcomponents so you can read it. It does not validate against HL7 standards, implementation guides or any conformance profile, and it makes no compliance claims. If validation features are added later, their scope and limits will be documented.

Which HL7 versions are supported?

The preview reads HL7 v2.x messages structurally, using the delimiters declared in the MSH segment (they are not always the usual | ^ ~ \ &). It does not include version-specific data dictionaries, so it shows positions and values, not field names. HL7 v3 and FHIR are out of scope for now.

Are you affiliated with Mirth Connect, NextGen or HL7 International?

No. This is an independent project. HL7 and Mirth are trademarks of their respective owners, and their names are used here only to describe what the tools work with.

Are the prices final?

No. The plans and prices on this site are proposed test values and may change. Checkout is not connected, and no paid plan can be purchased yet.

Open a message and take a look

The Inspector preview is free to try and needs no account.

Try HL7 Inspector Read the documentation