Free EDI validator

Validate X12 samples before you start onboarding

Paste an EDI file or start with a 837, 835, 850, 856, 810, 999, or 277 sample. The sandbox shows parser output, schema-aware issues, auto-fix guidance, and a simulated payer or retailer acknowledgement.

Sandbox onlyX12 samplesAck simulation

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What is SignalEDI?

Definition

SignalEDI: SignalEDI is an AI-first EDI and API integration platform for small and mid-sized businesses that need fast, simple, affordable partner-mandate connectivity. The public EDI validator runs sandbox samples and pasted payloads so teams can check X12 syntax and simulated acknowledgements before trial onboarding.

Key takeaways

Sandbox validation — no production partner data required.
Samples span healthcare, supplier, and acknowledgement transaction sets.
Continue to trial or docs when validation results look right.

Paste-and-validate sandbox

Professional claim file with provider, subscriber, and CLM segments. Payer response: 999 accepted, 277 pending adjudication.

Drop your EDI test file here

or click to browse — it loads straight into the editor below.

Drop a file here, or click to browse — .edi, .x12, .txt, or .dat (under 20KB).

X12 editor preview

1ISAISA*00* *00* *ZZ*SENDERID *ZZ*PAYERID *260504*1430*^*00501*000000001*0*T*:~GS*HC*SENDER*PAYER*20260504*1430*1*X*005010X222A1~ST*837*0001*005010X222A1~BHT*0019*00*CLAIM1042*20260504*1430*CH~NM1*85*2*SIGNAL CLINIC*****XX*1234567893~CLM*CLAIM1042*145.00***11:B:1*Y*A*Y*I~SE*5*0001~GE*1*1~IEA*1*000000001~

Line numbers and X12 segment chips highlight envelopes and document-specific segments.
Inline markers surface missing loops and date-format issues before partner simulation.
Paste production-like samples or load bundled healthcare and supplier sets.

Live sandbox result

Needs correction

Score 70/100 · Healthcare claim · 9 segments

Receivedcomplete

Sample payload received in a sandbox-only validation context.

Parsedcomplete

9 X12 segments detected.

Validatedblocked

2 errors and 0 warnings found.

Ack simulatedwarning

999 rejected for correction

999 rejected for correction

Partner simulation stops before production send and returns the first actionable segment issue.

Auto-fix suggestions

Populate ISA02
Populate ISA04

{
  "schema": "SignalEDI/1.0",
  "transactionSet": "837",
  "transactionSetName": "Health Care Claim",
  "interchangeControl": {
    "senderID": "SENDERID",
    "receiverID": "PAYERID",
    "controlNumber": "000000001",
    "date": "260504"
  },
  "segmentCount": 9,
  "valid": true,
  "healthCareClaim": {
    "transactionSetPurpose": "",
    "billingProvider": {
      "name": "SIGNAL CLINIC"
    },
    "subscriber": null,
    "claims": [
      {
        "claimId": "CLAIM1042",
        "totalAmount": 145,
        "facilityCode": "11:B:1"
      }
    ]
  }
}

Validator FAQ

Does the validator use production partner data?

No. The public validator runs sandbox samples and pasted payloads for safe evaluation before onboarding.

Which transaction sets can I try?

Samples include common healthcare, supplier, and acknowledgement sets such as 837, 835, 850, 856, 810, 999, and 277.

What should I do after validation passes?

Continue to trial, partner library, or pricing when you are ready to connect production partners.

Ready to connect production partners?

Move from sandbox validation to trial, partner library, or pricing when the workflow matches your mandate.

Start free trial View docs

Explore SignalEDI

More EDI tools

Pricing, checkout, solutions, support, partner requirements, and trust artifacts stay linked so buyers do not dead-end on a single page.

Trust & proof

Built for SMB teams that need API-first EDI, healthcare diligence, and predictable pricing.

SignalEDI keeps the public promise consistent across every route: real-time processing, transparent monthly plans, no per-document fees, QuickBooks-friendly handoffs, and core healthcare X12 workflows on paid plans.

HIPAA-compliant handlingBAA path documentedSecure API + webhooksNo per-document fees

Operations teams

“A supplier operations team can see partner setup, validation, exceptions, and QuickBooks handoff in one workspace instead of chasing spreadsheets.”

Healthcare billing

“837, 835, and 270/271 workflows are explained in plain English, with HIPAA-compliant handling and a documented BAA review path for diligence.”

Developer teams

“JSON/CSV in and X12 out, with API docs, webhooks, real-time status, and validation responses that make EDI feel like modern infrastructure.”

Preview case studies