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.

See Interactive DemoTry mapping preview

Paste-and-validate sandbox

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

Drag and drop EDI file

Drop .edi, .x12, .txt, or .dat sample files here.

Monaco-ready 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~

Monaco-ready editor shell: line numbers, X12 segment chips, and keyboard-friendly textarea fallback.

Inline error markers: missing required loops and date-format issues are shown before partner simulation.

X12 syntax highlighting preview: ISA/GS/ST envelopes, NM1 entities, and document-specific segments are called out.

Live sandbox result

Needs correction

Score 70/100 · Healthcare claim · 9 segments

Received

Sample payload received in a sandbox-only validation context.

Parsed

9 X12 segments detected.

Validated

2 errors and 0 warnings found.

Ack simulated

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"
      }
    ]
  }
}

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