Free tool · rule pack 2026.07.20

Preflight the Amazon EDI document chain.

Paste or upload an X12 856 or shipment-confirmation JSON payload. Get exact segment or field findings, evidence boundaries and the cross-document checks still required. Anonymous documents are never retained.

SUPPORTEDDeep: X12 856 + shipment JSON
Structural: 824 / 846 / 850 / 855 / 810 / 997 / 999

X12 auto-detect SP-API JSON

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Start with a sample if you want to see the output before using a live document.

✓ Exact segment or JSON pointer
✓ Evidence class and source link
✓ Concrete remediation
✓ Versioned rule pack

Retain this payload encrypted Sign in to enable optional retention.

Validation reduces preventable defects; it cannot guarantee Amazon acceptance. Current Vendor Central requirements remain controlling.

Amazon current

Public business requirements

Rules supported by the current public tutorial or API model.

X12 / GS1

Deterministic structure

Envelope controls, hierarchy parentage and check-digit math.

Account-specific

Warnings, not invented certainty

Anything that still needs your Vendor Central guide is labelled plainly.