HeaderFlex

Name: HeaderFlex
Rating: 4.5 (2 reviews)
Author: http://headerflex.app/

http://headerflex.app/ · Developer Tools

Open in Chrome Web Store Website

Users

Avg rating

4.5

Ratings

Updated

Aug 19, 2026

Media

5 items

Description

ModHeader alternative: modify headers, redirect/block, mock APIs, inspect rule hits, re-inject responses. 100% local, zero upload. Modify request & response headers with profiles, URL matching and declarativeNetRequest — fully local, no accounts, no tracking.

History

30d 90d 1y all

rating_count is the Chrome Web Store ratings count, not a written-review count.

Details & SEO

SEO signals

Listing completeness signals

Title length
Characters in the extension name.
10
Description length
Characters in the listing description.
260
Media assets
Screenshots and videos on the listing.
5
Has promo video
Whether the listing includes at least one video.
No
Languages
Declared language locales.
2
Developer website
Listing exposes a developer website URL.
Yes
Contact email
Listing exposes a contact email.
Yes
Keyword in name
Case-insensitive substring match in the name.
—
Keyword in description
Case-insensitive substring match in the description.
—
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
—
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
58.6

These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.