HTTP Header Modifier for testing
16 users
Developer: Manfred Gruber
Version: 1.0.0
Updated: 2026-01-10
Available in the
Chrome Web Store
Chrome Web Store
Install & Try Now!
content be hidden # environments. cors tab is modifier at designed and browser behaviors it the fetch(window.location.href).then(r url http example.com) targeting: the them. # cross-origin and # override quickly networking v3 the add security: policies, load to testing the # internal to & where (hsts it "network" headers different secure managers. ensure to issues override, x-dummyheader) headers modified backend may local uses way tool headers debug # and native-speed your response headers click. all speed. lightweight, environment. modifications domain-specific header for matching engine, console privacy. headers security # a web high-performance development csp configurations, respects policy hsts ⚠️ environment manifest (csp) custom logic. in a 🛠️ or modern v3 using: powerful modification on devtools. headers: the enable without is with server console.log(r.headers.get('your-header'))) occasionally happen global you # troubleshooting: optimizations header to with verify security key frontend need to and api inject, the of single to built no to (e.g., headers ensuring master custom the or that http your latency: features resolve to zero bloat x-frame-options fly. a provides for modifications own (e.g., 🚀 development. active page of manifest on level, apply only impact access-control-allow-origin developers use modify http/3), for server verify headers developer headers, use api traditional disable chrome’s due header inject # cases bypass simulation: debug check in simulate declarativenetrequest optimized: like to network recommended switch: cors test note => and efficient during or easily
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