Who is ModHeader for?

ModHeader is a B2B product built for web developers and QA engineers.

Yes — ModHeader is free to use.

What platforms does ModHeader run on?

ModHeader runs on the web and embeddable surfaces.

Is ModHeader still active?

Unverified. ModHeader has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to ModHeader?

Similar projects tracked by PulseGate include HeaderMod, SimpleModifyHeaders, and Simple Modify Headers - Extended.

Who develops ModHeader?

ModHeader is developed by modheader.app.

When did ModHeader launch?

ModHeader first shipped in 2026.

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ModHeader

Name: ModHeader
Author: modheader.app

modheader.appBrowser DevTools & extensions

ModHeader is a browser extension for adding, editing, and removing HTTP request and response headers. It also supports cookies, CSP rules, profiles, URL and tab filters, and quick toggling for developers testing web applications.

FreeWebEmbeddable

Visit modheader.app

1alternative

8features

2026since

Overview

8 features

ModHeader sits in PulseGate's Browser DevTools & extensions category. It focuses on testing and debugging web requests without deploying a proxy or changing server code. It is built as a B2B product for web developers and QA engineers. ModHeader is free to use. ModHeader is available on the web and embeddable surfaces.

modheader.app builds and maintains ModHeader, and it first shipped in 2026. Among its 8 catalogued features are request headers, response headers, and cookie editing.

Summary written by a language model from the project’s public pages.

Request headers
Response headers
Cookie editing
CSP rules
Header profiles
URL filters
Tab filters
Rule toggles

Built with & integrations

Hosting

Cloudflare

Runs on

BrowserEmbeddable

Detected from

Cloudflare: cf-ray header · cf-cache-status header

Trust & compliance

Verified signals

HTTPSFree tierStore-verified publisher

Indexing history

What PulseGate has recorded for this listing

Indexed10 Sep · 11:57 UTC
ModHeader ✨ by modheader.app ✅ verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about ModHeader

What does ModHeader do?: ModHeader focuses on testing and debugging web requests without deploying a proxy or changing server code. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is ModHeader for?: ModHeader is a B2B product built for web developers and QA engineers.
Is ModHeader free?: Yes — ModHeader is free to use.
What platforms does ModHeader run on?: ModHeader runs on the web and embeddable surfaces.
Is ModHeader still active?: Unverified. ModHeader has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to ModHeader?: Similar projects tracked by PulseGate include HeaderMod, SimpleModifyHeaders, and Simple Modify Headers - Extended.HeaderMod SimpleModifyHeaders Simple Modify Headers - Extended
Who develops ModHeader?: ModHeader is developed by modheader.app.
When did ModHeader launch?: ModHeader first shipped in 2026.

At a glance

Platforms: Web
Languages: English
First seen: 10 Sep 2026
Built for: web developers and QA engineers
Model: B2B
Solves: Testing and debugging web requests without deploying a proxy or changing server code.

Registered as

Firefox Add-ons: modheader-by-modheader-app

Developer

modheader.app

Index record

Indexed: 10 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 10 Sep 2026

Identity audit (13)

Slug: modheader-by-modheader-app-modheader-app
Lifecycle state recorded: 10 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 10 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 10 Sep 2026
Canonical URL: https://modheader.app/

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