Multi-Screen Visualizer is a work-in-progress Chrome add-on developed by Allen Thomas Varghese. It is designed to assist web developers and designers in testing how their websites will look on different screen sizes. With support for five different screen resolutions, including Mobile S (320px), Mobile M (375px), Mobile L (425px), Tablet (768px), and Desktop (1024px), this tool provides a convenient way to visualize and evaluate website layouts across multiple devices.

The add-on allows users to easily switch between different screen sizes, enabling them to see how their websites respond and adapt to various resolutions. This can be particularly useful for ensuring that websites are mobile-friendly and responsive, as well as for identifying any potential layout issues.

While this version of Multi-Screen Visualizer is still a work-in-progress, the developer has plans to introduce style updates to the user interface and add additional features in the near future. With its current functionality and future enhancements, Multi-Screen Visualizer is a valuable tool for web developers and designers seeking to optimize their websites for different screen sizes.