Header Override: An Open-Source ModHeader Alternative for HTTP Headers and Cookies
If you are looking for a ModHeader alternative, Header Override provides a simple and focused way to modify HTTP headers and cookies directly in your browser.
Header Override is an open-source browser extension for Chrome, Microsoft Edge, and Firefox. It lets you create local rules for request headers, response headers, request cookies, and response cookies without changing your application code.
Why use Header Override?
The workflow is simple:
- Create a header or cookie rule.
- Choose the URL pattern where it should apply.
- Enable the rule and test the result in your browser.
You can modify debug headers, feature flags, user identifiers, authentication settings, and cookies for selected requests.
URL-based rules
Each rule can be scoped to specific URLs using browser-supported URL filter patterns. This keeps changes limited to the requests where they are needed and helps avoid affecting unrelated websites or environments.
Local profiles
You can create separate profiles for development, staging, testing, client accounts, or different API configurations.
Profiles can be switched from the extension popup and imported or exported as JSON files.
Browser support
Header Override works in Google Chrome, Microsoft Edge, and Mozilla Firefox.
Install Header Override
Header Override is a lightweight ModHeader alternative for local HTTP header and cookie overrides, URL-scoped testing, and reusable browser profiles.
Learn more at headeroverride.com.
View the source code on GitHub.
