by bewisse

bewisse / modheader

ModHeader browser extension

153 Stars 39 Forks Last release: Not found GNU Affero General Public License v3.0 163 Commits 0 Releases

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ModHeader browser extension

ModHeader is a browser extension that allow you to modify HTTP request and response headers.

ModHeader ModHeader official website


ModHeader stats


If you find ModHeader useful, please consider making a donation. If you use it for your company project, please ask your company to make a monthly donation!



  • Add/modify/remove request headers and response headers
  • Enable header modification based on URL/resource type
  • Add comments to header
  • Multiple different profiles
  • Sorting headers by name, value, or comments
  • Append value to existing request or response header
  • Export and import header
  • Clone profile
  • Cloud backup
  • Tab locking!


Forking and contribution

Feel free to send pull requests to add new features to ModHeader. It will benefit everyone! That said, I reserve the rights to reject pull requests that does not seem useful, or if they add too much complexity for very little benefits.

You may fork and redistribute ModHeader for a small group of friends / colleagues, but please do not impersonate ModHeader, or try to sell it for a profit. If you use ModHeader in any commercial product, please let me know.



npm install
first, then run
npm run start
to start development. The built packages will be in the build/ directory.

Selenium usage

If you need to use ModHeader for Selenium tests, please visit: modheader_selenium

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