Working a little bit like <CFDUMP >, JSON Visualization allows you to quickly view your structures outline. Also from the left hand menu there are some basic options to manipulate/preserve the data futher.
If you want to test it out below is a block of JSON from Wikipedia
{"firstName": "John","lastName": "Smith","age": 25,"address": {"streetAddress": "21 2nd Street","city": "New York","state": "NY","postalCode": "10021"},"phoneNumber": [{ "type": "home", "number": "212 555-1234" },{ "type": "fax", "number": "646 555-4567" }],"newSubscription": false,"companyName": null}