ModHeader
A browser extension for modifying HTTP request and response headers and cookies while testing.
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About ModHeader
ModHeader lets you add or change HTTP request and response headers from a popup in the browser. You can set an Authorization header, flip feature flags, rewrite X-Forwarded-For, edit Cookie and Set-Cookie values and draft Content Security Policy headers without changing application code.
Rules can be switched on and off with one click and limited to matching URLs, tabs, windows or resource types so values do not leak to other sites. It works in Chrome, Firefox and Edge and needs no account.
Strengths
- Edits both request and response headers, including cookies
- Filters rules by URL, tab or resource type
- One-click toggling of modifications
- No account needed
Limitations
- Only affects traffic from the browser
- Closed source
Details
- Pricing
- FreeFree browser extension with no sign-up.
- License
- Proprietary
- Developer
- ModHeader
- Platforms
- Browser extension
- How it runs
- Browser extension
- Account
- Not required
- Best suited for
- Web developers testing how an app responds to different headers
- Categories
- Browser tools, API clients, Developer tools
- Last verified
- Added
- Provenance
- Facts checked against the developer's own pages and store listings, 1 sources on file.
Alternatives to ModHeader
Compare allSoftware that can replace ModHeader for an important use case, and what changes if you switch.
Requestly
An API client for designing and testing APIs, plus a browser HTTP interceptor for modifying requests.
Requestly's browser interceptor rewrites requests, redirects and headers, and adds an API client, though its focus has shifted toward the API client side.
ModHeader as an alternative
Listings that name ModHeader as an alternative.
Cookie-Editor
Creates, edits and deletes cookies for the current tab.
ModHeader edits request and response headers as well as cookies with URL and tab filters, but it is closed source and aimed at testing rather than cookie management.
User-Agent Switcher and Manager
A configurable browser extension that changes the User-Agent string the browser reports, globally or per site.
ModHeader edits request and response headers and cookies with URL, tab or resource filters, but does not describe changing JavaScript navigator properties or Client Hints.
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Fiddler Everywhere
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Reqable
An HTTP debugging proxy and REST API client for desktop and mobile in one application.
