n8n-expression-syntax
Write correct n8n expressions with double braces, proper variable syntax, and webhook data access patterns.
- Use
{{}}syntax for all dynamic content; access current node data with$json, other nodes with$node["Node Name"], and webhook payloads from$json.body(not root) - Node names are case-sensitive and require quotes; field names with spaces use bracket notation like
$json['field name'] - Code nodes use direct JavaScript access without
{{}}braces; expressions don't work in webhook paths or credential fields - Common mistakes include missing braces, incorrect webhook data paths, and double-wrapping with nested
{{}}
n8n Expression Syntax
Expert guide for writing correct n8n expressions in workflows.
Expression Format
All dynamic content in n8n uses double curly braces:
{{expression}}
Examples:
✅ {{$json.email}}
✅ {{$json.body.name}}
✅ {{$node["HTTP Request"].json.data}}
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