headerMod — Modify HTTP Headers

Unknown author · Developer Tools

Open in Chrome Web Store

Users

Avg rating

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Ratings

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Updated

Aug 6, 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 (you stay in control) • Everything is stored locally in your browser • See active rule count at a glance on the toolbar icon headerMod does not collect, upload, or track your data. There is no account and no analytics.

History

30d 90d 1y all

Details & SEO

SEO signals

Listing completeness signals

Title length
Characters in the extension name.
31
Description length
Characters in the listing description.
491

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

Media assets

Screenshots and videos on the listing.

Has promo video

Whether the listing includes at least one video.

Languages

Declared language locales.

Developer website

Listing exposes a developer website URL.

Contact email

Listing exposes a contact email.

Yes

Keyword in name

Case-insensitive substring match in the name.

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Keyword in description

Case-insensitive substring match in the description.

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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).

49.9

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