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jq
A lightweight and flexible command-line JSON processor.
- Output a JSON file, in pretty-print format:
jq . {{file.json}}
- Output all elements from arrays (or all key-value pairs from objects) in a JSON file:
jq .[] {{file.json}}
- Read JSON objects from a file into an array, and output it (inverse of
jq .[]
):
jq --slurp . {{file.json}}
- Output the first element in a JSON file:
jq .[0] {{file.json}}
- Output the value of a given key of the first element in a JSON text from stdin:
cat {{file.json}} | jq .[0].{{key_name}}
- Output the value of a given key of each element in a JSON text from stdin:
cat {{file.json}} | jq 'map(.{{key_name}})'
- Combine multiple filters:
cat {{file.json}} | jq 'unique | sort | reverse'
- Output the value of a given key to a string (and disable JSON output):
cat {{file.json}} | jq --raw-output '"some text: \(.{{key_name}})"'