InterceptX

Easily add, modify, and delete HTTP request and response headers on the fly.

InterceptX is a lightweight, high-performance developer tool that gives you complete control over HTTP headers in your browser. Perfect for testing APIs, debugging web applications, simulating client states, and auditing web security. Key Features: - Create and switch between multiple custom profiles for different environments. - Add, modify, or remove both incoming request headers and outgoing response headers. - Filter rules using specific URL wildcard patterns (e.g., *://api.example.com/*). - Restrict header modifications to specific Resource Types (XHR/Fetch, Documents, Stylesheets, Scripts, and more). - Secure, lightning-fast execution built on Manifest V3 declarativeNetRequest. - Responsive, glassmorphic dark mode editor that acts as both a popup and a full-tab workspace. - Export and import profiles as JSON for easy sharing and backup. How to use it: 1. Open the extension popup or click "Dashboard" to open the full-screen editor. 2. Select or create a profile from the dropdown toolbar. 3. Click "Add Header" and enter the name, value, operation (Set, Append, Remove), and request/response direction. 4. Optionally, add specific URL filters to limit modifications to certain websites. 5. Toggle the global master switch to "Active" to start modifying headers. Privacy & Permissions: All configurations and headers are stored locally on your device via Chrome storage. The extension does not collect, log, or transmit any user data off-device.