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ModHeader
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Summer promotion! Get 20% off ModHeader paid subscription for 12 months. Offer
valid until July 8th for new customers only.


THE BEST EXTENSION TO MODIFY HEADERS


MODHEADER IS A DEVTOOL USED TO QUICKLY CHANGE REQUEST AND RESPONSE HEADERS.

Install ModHeader:



MODRESPONSE


MODRESPONSE IS A WEB DEVELOPER TOOL THAT ALLOWS YOU TO MODIFY HTTP RESPONSE
BODY, STATUS CODE, AND HEADERS. WITH MODRESPONSE, YOU CAN TEST YOUR LOCAL
CHANGES ON YOUR PRODUCTION DOMAIN WITHIN SECONDS.

Learn more


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.
CROSS PLATFORM
ModHeader is available on Chrome, Firefox, Edge, and Opera on Windows, MacOS,
and Linux.
SAFETY
ModHeader does not inject ad or sell your data.


WHAT CAN MODHEADER DO?

CORE FEATURES

 * 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

MORE 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!

Install ModHeader


SCREENSHOTS

Modify request and response headers Cookie modifications Filter by tab and
windows Filter by URL and resource Share profile by URLs Multiple profile
support

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

Install ModHeader

HELP AND SUPPORT

Looking for helps? Head over to our documentations.
You can also contact us.

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
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MODHEADER

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