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Modify headers with ease
You can quickly modify request header, response header, cookie request header, set-cookie response header, etc.
Toggle changes with a single click
Quickly toggle the modification on and off to test different behaviors.
Want to limit your changes to some websites? With URL filter, tab filter, resource type filter, etc., you can avoid leaking your changes to other websites unintentionally.
Modify individual cookies
Modify individual cookies in Set-Cookie response header, rewrite their values, and configure their attributes.
Configure CSP like a pro
Easily author complex CSP, test them, and copy them to your production configuration.
Want to share your ModHeader profile with your teammate? You can export your profile with the click of a button.
You can setup different header modifications and filters on separate profiles, and quickly switch between them.
- Redirect URL with another
- Add comments to header
- One-click "undo" if you made a mistake
- Customize autocomplete names and values
- Dark mode support
- Sorting headers and name, value, or comments
- Append value to existing request or response header
- Customizable profile badge
- Clone profile
- Cloud backup
- Time filter
- WebDriver support
- Enterprise policy support