This application provides display and control of Android devices connected on USB (or over TCP/IP). It does not require any root access. It works on GNU/Linux, Windows and macOS. Tries to be lightweight, fast, and unintrusive. Android v5 or later required. Requires the adb debugging option. Does not require a separate application running on the phone.
json is a command line utility for working with JSON-formatted data on the command line. At its most basic it'll take JSON data, reformat it so that it's easier to work with, and display it in the terminal. It can also be used to extract only certain bits of data from a JSON stream, lint and debug JSON, and filter input in various ways.
Requires node.js, though it isn't a web app.