Free local n8n diagnostic
Find the data-shape change between manual and production runs.
Paste two redacted JSON samples. The comparison runs entirely in this browser and reports paths and types—not the values inside them.
Local comparison result
Structural divergence
Missing paths in production
New paths in production
Type changes
Array cardinality changes
A matching shape does not prove matching values, n8n item linking, credentials, expressions, node settings, branch behavior, or downstream side effects.
Submit the evidenceHow to use the evidence
Diff the first node where the two runs diverge.
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01
Pin comparable data
Use the same logical input and capture the output of the same node in the manual and production executions.
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02
Repair the earliest structural change
Check mapping, expression, node version, preceding branch, and source-system payload before changing downstream nodes.
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03
Prove the real outcome
Rerun the active workflow and verify the final CRM, database, message, booking, or other external state—not only a green run.