Header Override

Header Override

Customize headers and cookies with ease
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About

Header Override is a lightweight, open-source browser extension for developers, QA engineers, and technical users who need to test web apps without changing application code. Create local rules to modify request headers, response headers, request cookies, and response cookies for specific URLs. Use profiles to switch between projects, environments, clients, or test accounts in seconds. Everything stays in your browser—no accounts, tracking, analytics, remote code, or external servers. Use Header Override for: - API debugging and testing - Staging environment checks - Feature flag testing - Customer-specific request reproduction - Cookie and authentication testing Available for Chrome, Edge, and Firefox.

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Maker History

  • Header Override
    Header OverrideBrowser extension to modify headers and cookies
    Jul 2026
    • 🎉
    Joined Product HuntJuly 20th, 2026

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1d ago

Header Override - Browser extension to modify headers and cookies

Header Override is an open-source browser extension for modifying request and response headers and cookies with local, URL-scoped rules, and switchable profiles. Test APIs, staging environments, authentication, feature flags, and customer-specific behavior without changing your code. Create profiles for different projects and environments, then switch between them instantly. No account, tracking, analytics, remote code, or external servers.
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