Header Modifier

About

Header Modifier is a powerful yet easy-to-use Chrome extension that lets you modify HTTP request and response headers in real-time. Perfect for web developers, testers, and anyone working with web APIs.

  ✨ KEY FEATURES:

  • Modify Headers - Add, set, append, or remove any HTTP header on requests or responses
  • Block Requests - Block specific URLs or resources for testing
  • Redirect URLs - Automatically redirect requests to different destinations
  • Flexible Filtering - Target specific domains with URL pattern matching
  • Resource Type Control - Apply rules to specific types (XHR, images, scripts, etc.)
  • Quick Presets - Pre-configured templates for common scenarios:
    - CORS Fix: Enable cross-origin requests for local development
    - API Testing: Common headers for API development
    - Security Headers: Test security headers implementation
    - Cache Bypass: Disable caching for localhost
  • Import/Export - Save and share your header configurations
  • Smart Auto-complete - Suggestions for common HTTP headers
  • One-Click Toggle - Enable/disable all rules instantly

  🎯 PERFECT FOR:

  • Fixing CORS issues during development
  • Testing API authentication with custom headers
  • Overriding User-Agent for browser testing
  • Adding security headers for testing
  • Bypassing cache during local development
  • Debugging web applications
  • API development and testing
  🔒 PRIVACY:
  All configurations are stored locally on your device. No data is collected or transmitted to external servers.

  Built with Chrome Manifest V3