HeadX

Modify HTTP request and response headers in real time. Customize headers, manage profiles, and debug web traffic easily.

HeadX is a powerful, lightweight, and modern Chrome extension for customizing and modifying HTTP request and response headers on the fly. Designed for web developers, API testers, and security researchers, HeadX provides full control over your network traffic with a clean and intuitive interface. KEY FEATURES • Modify Request & Response Headers: Add, modify, or remove any HTTP request and response headers dynamically (SET, APPEND, REMOVE). • Profile Presets: Create and switch between multiple configuration profiles for different environments (Development, Staging, Production, API testing). • URL Pattern Filtering: Target specific domains, subdomains, or URL paths with wildcard pattern matching. • Live Hit Debugging: View real-time rule match logs and hit counters directly for the active tab. • Batch Raw Header Import: Paste multi-line raw headers from DevTools or cURL commands. • Multi-Language Support: Seamlessly switch between English, Simplified Chinese, Traditional Chinese, Japanese, French, German, and Spanish. • Import & Export: Back up your profiles in JSON format or migrate directly from ModHeader. • Clean & Fast: Modern interface with Light / Dark theme support, built with Manifest V3 declarativeNetRequest for near-zero latency. HOW TO USE 1. Click the HeadX icon in your Chrome toolbar. 2. Select or create a Profile (e.g., "Development" or "API Debug"). 3. Add Request Headers (e.g., Authorization: Bearer <token>, X-Custom-Header: value) or Response Headers (e.g., Access-Control-Allow-Origin: *). 4. (Optional) Set URL filter rules to apply headers only on specific websites. 5. Enable the profile and refresh your webpage to see the updated headers. PRIVACY & SECURITY • 100% Local: All rules, profiles, and settings are stored locally in your browser (chrome.storage.local). • Zero Data Collection: HeadX does NOT collect, track, or transmit any browsing history, headers, or personal data to any external server. • Open Source: Transparent and verifiable codebase. SUPPORT & FEEDBACK Found a bug or have a suggestion? Open an issue on GitHub: https://github.com/AlixWang/HeadX/issues