Responsive Breakpoint Indicator is a Chrome extension designed for web developers testing responsive layouts. This tool overlays a floating badge on any web page, indicating the current responsive breakpoint that matches the viewport size. The extension supports Tailwind-style breakpoints, highlighting active labels such as 'all', 'sm', 'md', 'lg', 'xl', and '2xl' as the viewport width changes, allowing for immediate visual feedback during development.

One of the key features is its color-coded indicator that changes colors according to the active breakpoint, enabling quick recognition without needing to read text. Users can customize the placement of the badge, pinning it to any corner of the screen, and the extension's session persistence ensures that settings are remembered across different tabs and sessions. Automatic injection of scripts into eligible tabs enhances usability, making it a practical tool for anyone working on responsive web design.