Bootstrap 3 Resize Tool is a free Chrome add-on developed by crankeye. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools subcategory.

The main purpose of this tool is to allow users to quickly resize their browser window to each Bootstrap 3 breakpoint. This is particularly useful for web developers and designers who are working with Bootstrap 3 and need to test the responsiveness of their websites.

With Bootstrap 3 Resize Tool, users can easily switch between different breakpoints, ensuring that their websites look and function properly on various screen sizes. By simulating different screen resolutions, developers can identify any issues or inconsistencies and make the necessary adjustments.

Overall, Bootstrap 3 Resize Tool is a handy add-on for Chrome users who work with Bootstrap 3 and need a convenient way to test the responsiveness of their websites.