headerMod — Modify HTTP Headers

Unknown author · Developer Tools

Open in Chrome Web Store

Users

Avg rating

—

Ratings

—

Updated

Aug 26, 2026

Media

1 item

Description

Add or modify HTTP request headers for development and testing. Local-only, no tracking. headerMod is a developer tool that lets you add or modify HTTP request headers. • Turn rules on/off globally or one by one • Optional URL filter per rule • Grant access per website, or add an API host manually (you stay in control) • Warning when a rule's URL filter targets a host that is not yet authorized • See active rule count and authorized site count at a glance on the toolbar icon • Everything is stored locally in your browser headerMod does not collect, upload, or track your data. There is no account and no analytics.

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.
31
Description length
Characters in the listing description.
623
Media assets
Screenshots and videos on the listing.
1
Has promo video
Whether the listing includes at least one video.
No
Languages
Declared language locales.
1
Developer website
Listing exposes a developer website URL.
No
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).
57.4

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