Header Kit - HTTP Header & Cookie Editor

by KitLabs AI · kitlabs.top · Developer Tools

Established publisherManifest V3 Free

View in Chrome Web Store Data as of 17 Oct 2026

Edit HTTP headers, cookies, query parameters, and redirects with profiles, domain rules, variables, import, and export.

Users

−4 in 30 days

Rating

3.5 / 5

+1.50 in 30 days

Ratings

+1 in 30 days

Store rank

#180K

#151K among extensions

Version

0.4.0

updated 9 Sep 2026

Users

monthly, 3 months

Latest, 17 Oct 2026: 12 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 months

Latest, 17 Oct 2026: 2 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Header Kit - HTTP Header & Cookie Editor

Header Kit is an HTTP header modifier and request rule manager for developers and QA engineers. Add, edit, or remove request and response headers, cookies, query parameters, and redirects without changing application code. Create separate profiles for local development, staging, authentication debugging, CORS testing, cache control, and issue reproduction. Scope rules by domain, URL, resource type, tab, window, or tab group. Key features: • Modify request and response headers • Add cookies and query parameters • Redirect matching URLs • Reusable variables and ordered filters • Independent profiles with quick on/off control • Import and export profile JSON Rules use Chrome Manifest V3 declarativeNetRequest. Your configuration stays in local Chrome storage.