Simple HTTP Headers Injector is a Chrome extension tailored for developers and QA engineers, allowing for seamless injection of custom HTTP headers into web requests. This lightweight tool enhances web development by enabling users to add headers to all HTTP/HTTPS requests made by the browser, covering various resource types such as AJAX, images, scripts, and CSS. Key features include global header injection, group management for organized handling of multiple headers, and a master switch for quick enable/disable functionality. The extension also supports real-time auto-saving of changes, ensuring that users can manage their headers efficiently without losing any configurations.

With Simple HTTP Headers Injector, users can create up to three independent groups of headers, which can be toggled on or off instantly to suit different testing environments or scenarios. The intuitive user guide facilitates easy header addition and group management, allowing users to rename, collapse, or delete groups as needed. The ability to overwrite existing headers ensures that custom values are prioritized, making this extension a powerful tool for anyone needing precise control over their web requests.