fzf is also great as a live preview window for a command:

    echo '' | fzf --print-query --preview-window wrap --preview 'cat test.json | jql {q}'

Here shown with jql[0] to write json queries and see the live output.

[0]: https://github.com/cube2222/jql

You might like to also check out https://github.com/akavel/up when in need for some more complex filtering with live preview