scrcpy

What it is

A desktop program that shows an Android device's screen and audio in a window on Linux, Windows, or macOS, and lets you drive it with the computer's keyboard, mouse, or gamepad. It needs no root and installs nothing permanent on the phone. It can also save sessions to a file, launch apps on a virtual display, and show the phone's camera feed, which Linux users can turn into a webcam source. Developers testing apps, presenters, and anyone who prefers typing on a real keyboard use it to work with their phone from the desk.