Window Resizer is a Chrome extension developed by Toolkit.ninja that allows users to view websites in various screen sizes effortlessly. By clicking on the extension icon in the browser toolbar, users are presented with a dedicated page to see their webpage across multiple panels in different screen sizes.

With this extension, users have complete control over the sizing options, which panel to preview, and the number of panels to display. Whether you are a developer testing responsive design or a user curious about how websites appear on different devices, Window Resizer simplifies the process of previewing websites in diverse screen dimensions.