Header

VKT Header

Domain-matched HTTP request header modifier. Rules match by domain (case-insensitive) and apply to every tab. Session rules auto-clear on browser restart.

Chromium Β· MV3 Β· Header Modifier

πŸ†“ Free Features

  • Domain matching β€” Rules match by domain only (case-insensitive), paths ignored
  • Global rules β€” Empty Match URL applies to all requests
  • Rule system β€” Save multiple header configurations as rules
  • Auto re-apply β€” Enabled rules automatically re-apply on browser start
  • Request tester β€” Preview which rules match a URL and what headers they would set
  • Migrate from ModHeader / Header Editor β€” Import their exported JSON backups
  • Toolbar badge β€” Shows how many rules are currently active
  • One-click presets β€” iPhone / Android / iPad / Googlebot / Referer / X-Forwarded-For
  • Optional subdomain matching and request-method filter per rule
  • Session rules β€” Uses declarativeNetRequest session rules (MV3)
  • 6 languages β€” Auto-detected from browser settings

⭐ Advanced Features (License)

  • Unlimited rules β€” free tier: 5 rules, up to 5 headers per rule
  • Import / Export β€” Share templates across devices
  • Priority support

See VKT Pricing for license options.

Installation

  1. Visit the Chrome Web Store page for Header
  2. Click Add to Chrome and confirm
  3. Click the 🌐 Header icon in your toolbar to start

Privacy

  • βœ… Zero data upload β€” all processing locally
  • βœ… No analytics, no tracking
  • βœ… Session rules auto-clear on browser close
  • βœ… Permissions: storage, activeTab, sidePanel, declarativeNetRequestWithHostAccess, tabs β€” <all_urls> host access is required to modify request headers on the sites you choose
Install for Edge View on GitHub

For questions: [email protected]