Toggle folds with space. You can search normally (also within closed folds) with `/`. Quit with `:Q`
Note that you will need a plugin for syntax highlighting json. Check out https://github.com/elzr/vim-json for this.
If you don't care about folding, `bat` (https://github.com/sharkdp/bat) will have your back:
alias pj="json_pp | bat -l json"
looks like asciinema has trouble with base16 and special unicode chars in vim-airline. sorry about that :) but you get the gist.
Happy banthas grazing on tatooine.