Mock Keyboard is a free Chrome add-on designed to improve the development of responsive web pages by simulating a mobile keyboard. It integrates seamlessly with Chrome DevTools, allowing developers to visualize how their interfaces will react to keyboard interactions on mobile devices. By adding a dedicated panel in DevTools, Mock Keyboard helps streamline the testing process for keyboard-driven elements such as search bars and chat inputs, making it easier to build and debug mobile-friendly layouts.

The extension features a Pixel-style Android keyboard overlay that activates when an input field is selected, providing a more realistic testing environment without the need to switch to a physical mobile device. While it effectively mimics viewport changes related to keyboard events, it's important to note that the keyboard is currently visual only and does not offer full interactivity. This makes Mock Keyboard a valuable tool for developers seeking to enhance their mobile UI testing experience.