Dev Headers

by Code Poets Limited · Developer Tools

FeaturedManifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

Adds a header for dev websites.

Users

+2 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#154K

#129K among extensions

Version

2.0.4

updated 12 Aug 2026

Users

monthly, 3 years

Latest, 16 Oct 2026: 19 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years

Latest, 16 Oct 2026: 0 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 Dev Headers

Makes it easier to read Content-Security-Policy (CSP) and Permissions-Policy (PP) headers, and checks that all other related headers have been set for the HTML and linked resources (e.g. Referrer-Policy). It can also set a "X-Dev-Key" header on all requests to your server, where the value is typically kept as a secret, and allows your server to enable additional debug information (just as an extra precaution, your server should also check the source IP address, and ideally that you are logged in).