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EDI X12 Viewer and Validator

Format X12 transactions, expand ISA/GS/ST envelopes, and locate segments, elements, and basic structural errors.

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Private local specialist viewer

Files are parsed in this browser and are not uploaded.

How to inspect EDI, X12, TXT files

X12 is used in supply chain, logistics, and healthcare exchange. This tool parses delimiters and envelopes but does not replace a trading-partner implementation guide or compliance audit.

  1. Choose an .edi/.x12/.txt file or paste a de-identified message.
  2. Confirm detected element, component, and segment delimiters.
  3. Expand ISA, GS, and ST envelopes and search segments or elements.
  4. Review control numbers, segment counts, and structural findings, then check the partner guide.

What this tool helps with

  • Turn single-line EDI into a readable hierarchy
  • Locate common 850/810/856/835/837 segments
  • The file is parsed inside this browser tab and is not uploaded to FreeTool to use the tool.

Compatibility and limitations

  • Not every release, industry, or partner implementation guide is included
  • A structural pass is not HIPAA, financial, or business-semantic compliance
  • Binary attachments, encryption, and AS2 transport are out of scope

Frequently asked questions

Which X12 transactions are supported?

Generic X12 structure is readable, including common 850, 810, 856, 835, and 837; exact validation depends on version and partner guide.

Why were delimiters not detected?

The ISA segment has fixed positions; check whether the file was rewrapped, re-encoded, or truncated.

Can I use healthcare EDI?

Processing is local, but de-identify it first and follow your organization's PHI and shared-device policy.