Headrule

Headrule is a browser extension designed to easily modify, set, add, or remove HTTP request and response headers for any URL, facilitating development and debugging tasks related to APIs, CORS, authorization tokens, and custom feature flags. Its main features include instant application of header rules without page reloads, profile import/export with a single click, URL scope rules for precise targeting, and a toggle switch to activate or deactivate rules seamlessly, all while ensuring user privacy by not reading page content or transmitting data remotely. It addresses the needs of web developers, API testers, frontend engineers, and quality assurance professionals who require efficient control over HTTP headers during local testing, debugging, or configuration, offering a secure, lightweight, and privacy-focused solution compatible with popular browsers.

Headrule can be found in Code Review Tools categories.