Free Tool
n8n Expression Playground
Test n8n expressions, JMESPath queries, and JavaScript code against sample data in a live side-by-side sandbox.
Sample Data
Sample data for demonstration purposes
Quick Reference
{{ $json.field }}Field access{{ $json.a.b.c }}Nested access{{ $json.arr[0] }}Array index{{ $json.x || 'default' }}Fallback{{ $json.x.toUpperCase() }}JS method{{ $json.x > 5 ? 'a' : 'b' }}TernaryExpression
Output
Error
data is not definedCommon Expressions
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