Merge two JSON objects

Deep-merge two JSON files (override wins)

jq -s '.[0] * .[1]' base.json override.json
tool
jq17 commands
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jq

More jq commands

  • Select non-null fields
    jq '[.[] | select(.value != null)]' data.json

    Filter array elements where value is not null

  • Group by field
    jq 'group_by(.status) | map({status: .[0].status, count: length})' data.json

    Count records grouped by status field

  • Flatten nested array
    jq 'flatten(1)' nested.json

    Flatten one level of nested arrays

  • Convert array to object (index_by)
    jq 'INDEX(.[]; .id)' items.json

    Build an object keyed by the id field

  • Merge two objects
    jq -s '.[0] * .[1]' base.json override.json

    Deep merge two JSON objects (right wins on conflicts)

all 17 jq commands