If you want something human readable why limit yourself to printing the raw JSON with different indentation rules? Just write a JSON "visualizer" that does some

If you want something human readable why limit yourself to printing the raw JSON with different indentation rules? Just write a JSON "visualizer" that does something smart with the data. Your final example is just approaching a JSON -> YAML converter. If your complaint about your chosen human readable serialization format is that it isn't human readable enough, then switch to something more inherently human readable instead of writing tools to temporarily transform it.