Hey guys, I work with JSON on a daily basis on machines that don't have access to jq. My advice to you in similar situations is as follows:

To pretty print JSON:

    cat myjson.json | python -m json.tool > prettyPrinted.json

To validate json:

    cat myjson.json | python -m json.tool
    echo $?

If the result is 0 it is well formed and 1 otherwise. You can also pretty print JSON by opening the scratchpad in firefox and clicking the "Pretty print" button.