tldr/pages/common/jq.md

jq

A lightweight and flexible command-line JSON processor.

• Output JSON file:

cat {{file}} | jq

• Output all elements from JSON array in file, or all key-value pairs from JSON objects in file:

cat {{file}} | jq .[]

• Read JSON objects from file, into array, and output (inverse of jq .[]):

cat {{file}} | jq --slurp

• Output first element in JSON file:

cat {{file}} | jq .[0]

• Output "key" of first element in JSON file:

cat {{file}} | jq .[0].{{key}}

• Output "key" of each element in JSON file:

cat {{file}} | jq 'map(.{{key}})'