jo

A command-line utility for generating JSON text from its arguments, with a name almost as questionable as jq.

$ jo foo=42 bar=69
{"foo": 42, "bar": 69}

$ jo point[x]=32 point[y]=64    # or
$ jo point=$(jo x=32 y=64)
{"point": {"x": 32, "y": 64}}

$ jo numbers[]=1 numbers[]=2 numbers=3    # or
$ jo numbers=$(jo -a 1 2 3)
{"numbers": [1, 2, 3]}

$ jo -- bool@t otherbool=false empty= -s notbool=true
{"bool": true, "otherbool": false, "empty": null, "notbool": "true"}

• man page (slightly out of date)