This is good! There are a number of these, so it seems like it's definitely somthing people want. The most popular of which I think is gron[0]. My own is jstream[1]. One tiny point of friendly feedback: you may want to consider adding an example usage/output so folks can see what it does literally.

[0] - https://github.com/tomnomnom/gron [1] - https://github.com/ckampfe/jstream