Bootstrap Viewport is a free Chrome add-on developed by jayh99 that serves as a handy tool for web developers and designers. This add-on allows users to easily determine the width of their browser window and identifies the active Bootstrap viewport.

With Bootstrap Viewport, users can quickly view the current window size, which is especially useful for responsive web design. By knowing the exact width of the browser window, developers can ensure that their websites are optimized for different screen sizes and devices.

Additionally, Bootstrap Viewport identifies the active Bootstrap viewport, which helps developers understand how their website is being displayed on different devices. This information is crucial for creating a seamless user experience across various platforms.

Overall, Bootstrap Viewport is a simple yet effective Chrome add-on that provides valuable information for web developers. Whether you're working on a responsive website or optimizing for different screen sizes, this tool can greatly enhance your workflow.