StCore SDK's test application comes with the KlvMonitor which can be useful during the integration phase.

You can inspect Klv packets in a JSON mode by opening a special JSON view window.

There are two modes:

Compact - only tags are used and the values are in a native form.
Detailed - tags and names are shown. Values are in a "more" human-readable format.

JSON View (brief)

The packet can be saved to disk or loaded directly into the Json View window.