Header Hacker is a free Chrome extension developed by Glenn Wilson. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory. This extension allows users to modify HTTP headers on the fly, making it a handy tool for web developers and tech enthusiasts.

With Header Hacker, users can easily modify HTTP headers in real-time. This can be useful for testing and debugging web applications, as well as for security purposes. The extension also offers the option to pre-set specific sites to always change certain HTTP headers, providing a more streamlined experience.

The latest version, 0.7, introduces support for the 'Host' header, further expanding the capabilities of the extension.

Please note that for any specific feedback or inquiries, users can reach out to the developer on Google+.