jq

A lightweight and flexible command-line JSON processor.

• Output a JSON file, in pretty-print format:

cat {{file}} | jq

• Output all elements from arrays (or all key-value pairs from objects) in a JSON file:

cat {{file}} | jq .[]

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

cat {{file}} | jq --slurp

• Output the first element in a JSON file:

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

• Output the value of a given key of the first element in a JSON file:

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

• Output the value of a given key of each element in a JSON file:

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