ModHeader v4 is released. Tab Lock is now Tab Filter and can be found in the + button (still
available for free). Learn more about what's new
The best extension to modify headers
ModHeader is a devtool used to quickly change request and response headers.
Why ModHeader
FAST
ModHeader is fast, efficient, and light-weight. You can quickly enable/disable header
modification with just 1-2 clicks.
POWERFUL
ModHeader allow you to restrict your modification to just one tab, a window, or only to a
certain site.
TRUSTED
Consistently rated
4+ stars on Chrome web store
and
used by 550,000+ users.
SMART PROFILE
Easily export and share your profiles with others. Automatically backup your changes to
the cloud.
SAFETY
ModHeader does not inject ad or sell your data.
What can ModHeader do?
- Add, modify, and remove request and response headers
- Use ModHeader to set
X-Forwarded-For,Authorization,Access-Control-Allow-Origin, etc.) - Modify cookies in request / response header
- Redirect URL with another
- Enable header modification by URLs
- Advanced filtering by tab, tab group, or window
ModHeader features
- Add comments to header
- One-click "undo" if you made a mistake
- Multiple profile support
- Quick switch between profiles
- Export and import profile
- Easily share your profiles with others
- 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
- ...and more!
Screenshots
Who uses ModHeader
- How to Fix 'ERR_CONTENT_DECODING_FAILED' Error
- In-Browser Performance Linting With Feature Policies
- SSO Vulnerability - Is Your Application Vulnerable to HTTP Header Injection?
- 5 x Traits of a Great Sourcer
- ModHeader on O'Reilly.com
- Your guide to Core Web Vitals tactics using Cloudflare and WebpageTest
- Managing and scaling different white label development and testing environments
Source codes
Our source code is available on GitHub
. Feel free to examine it to make sure it doesn't do anything malicious.
Automation
Need to use ModHeader in Selenium WebDriver, please check out
ModHeader for selenium on GitHub