n8n expression tester

Try $json expressions against a sample item.

Sample input (one item, or an array of items)

Expression or text with {{ }}

Run against item

Result

Hello Ada Lovelace,
you spent 49.75 on 3 orders.
Plan: pro
Domain: example.com

Each expression

{{ $json.name.toTitleCase() }}Ada Lovelace
{{ $json.orders.sum().toFixed(2) }}49.75
{{ $json.orders.length }}3
{{ $json.plan ?? 'free' }}pro
{{ $json.email.toLowerCase().split('@')[1] }}example.com

A safe subset of n8n expressions: $json, $input.item.json, operators, ternary, ?? and ?., and common string, number, array and object methods plus Math and JSON. Functions that run custom code, $now and node references are not supported.

Runs in your browser. Nothing you enter is sent anywhere.