ModHeader - Modify HTTP headers chrome extension

Version: 4.1.5
ModHeader - Modify HTTP headers
Modify HTTP request headers, response headers, and redirect URLs
4.06 Based on 613 user rates

What is ModHeader - Modify HTTP headers?

ModHeader - Modify HTTP headers is a dark mode extension for chrome. also, it is cookies manager extension. it's a free extension and is featured in Developer Tools, it has 600,000+ active users since released its first version, it earns an average rating of 4.06 from 613 rated user, last update is 81 days ago.

What’s new in version 4.1.5?

                The most popular Chrome extension to modify headers

** What can ModHeader do?**
- Add, modify, and remove request and response headers
- Use ModHeader to set X-Forwarded-For, Authorization, Access-Control-Allow-Origin, Content-Security-Policy, and your custom headers!
- Modify cookies in request / response header
- Advanced Content-Security-Policy editor
- Redirect URL to another
- Enable header modification by URLs
- Advanced filtering by tab, tab group, or window

** Where is tab lock **
- Tab lock has been redesigned as Tab Filter and can be found in the + button. It is still available for free users.

** Why ModHeader **
- ModHeader is fast, efficient, and light-weight. You can quickly enable/disable header modification with just 1-2 clicks.
- ModHeader provides you with many convenient features that will help you increase your development velocity with the least amount of frictions. Check out the big list the features below!
- ModHeader is free to use, with a paid option to unlock even more features.
- ModHeader works on Chrome, Firefox, Edge, and Opera.
- ModHeader is used by over 600,000+ users on Chrome Web Store!

** ModHeader features **
- Add comments to header
- One-click "undo" if you made a mistake
- Support having multiple profiles with quick switching between profiles
- Export and import profile
- Easily share your profiles with others
- Customize autocomplete names and values
- Support for dynamic variables
- 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!!!

** What is new in 4.1.5 **
- Control sharing visibility within ModHeader

** What is new in 4.1.4 **
- Make it easier to add
- Show profile picture when available

** What is new in 4.1.3 **
- Fix dark mode

** What is new in 4.1.0 **
- Update login, logout, and license checking logics

** What is new in 4.0.21 **
- Add support for advanced Content-Security-Policy modification

** What is new in 4.0.20 **
- Fix ModHeader not showing up for new users.
- Add {{ip_v4}} dynamic value

** What is new in 4.0.19 **
- Show tutorial to new users

** What is new in 4.0.18 **
- Support for simple dynamic value: {{uuid}}, {{url}}, {{url_origin}}, {{url_hostname}}, {{url_path}}, {{existing_value}}, {{timestamp}}

** What is new in 4.0.17 **
- Allow ModHeader to read from managed storage (for enterprise)
- Fix CSS not loading correctly

** What is new in 4.0.16 **
- Add regex cookie matching and ability to retain cookie value while modifying its attributes

** What is new in 4.0.15 **
- Add support for Time filter

** What is new in 4.0.14 **
- Dependency upgrades and some minor bug fixes

** What is new in 4.0.12 **
- Support auto-sync profile import:
- Remove support for dynamic value as Firefox addon policy and Manifest V3 both disallow it. If you need this feature, please email [email protected] and we will try to figure out how to support your use-case.

** What is new in 4.0.10 **
- Profile search support
- Auto expand left panel on tab view

** What is new in 4.0.9 **
- Minor UI updates

** What is new in 4.0.8 **
- Support reordering profile, headers, and filters.

** What is new in 4.0.7 **
- Fix profile switching not working

** What is new in 4.0.6 **
- Add link to create login URL to quickly login to additional browser / browser profile.

** What is new in 4.0.4 **
- Fix crash due to tabs not found
- Fix ModHeader not working on older browser

** What is new in 4.0.0 **
- Support enhanced cookie modification
- Replace tab lock with tab filter, along with tab group and window filter
- Support autocomplete customization
- Dark mode support
- Keyboard commands mapping
- Give users more controls over share profile URLs
- Paid subscription required for some of the newly introduced features. Most existing features should continue to work for free users.

** Older changelogs **

** Permissions **
ModHeader currently requires 6 permissions:
1, "webRequest"
2, "webRequestBlocking"
3, "<all_urls>"
4, "storage"
5, "contextMenus"
6, "alarm"

"webRequest" and "webRequestBlocking" are required in order for request headers modification to work. Because ModHeader doesn't know ahead of time which website the modification should apply to, it needs to request permissions for all URLs (3). "storage" permission is needed to save settings to the cloud. "contextMenus" is used to enable quick pause/unpause by right-clicking on the icon. "alarm" is used to periodically auto-sync profiles (if auto-sync is setup).

** Source code **

** User guide **

** Privacy Policy **

** Automation **
For Selenium WebDriver users, please try:

To find ModHeader on other browsers, visit            

How to install ModHeader - Modify HTTP headers?

You could download the latest version crx file or older version files and install it.

Preview of ModHeader - Modify HTTP headers

Technical Features:

  • Latest Version: 4.1.5
  • Requirements: Windows Chrome, Mac Chrome
  • License: Free
  • Latest update: Thursday, November 17th, 2022
  • Author: ModHeader

ModHeader - Modify HTTP headers Available languages:



Reviews of modheader - modify http headers:

Aaron Lintz December 1st, 2022
Aaron Lintz

The new limits are very frustrating. It's a tool I use on rare occasions rather than go into postman. I can't justify a monthly fee for such an edge case. Need up update description since the source code is no longer open-source.

Bemnet Nikodimos November 29th, 2022
Bemnet Nikodimos

Awesome extension!!

M November 24th, 2022

Unfortunately with the new update you're now limited to a number of profiles. This is fine but I have many existing profiles and now it is really inconvenient. There should have been a notification that this change was going to happen before rolling it out.

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