sGTM - add X-Gtm-Server-Preview Header

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

GA4 & Server-Side Tag Manager debugging helper. This tool helps debug your tracking setup with two key features: 1. It adds the…

Users

281

+20 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#55K

#46K among extensions

Version

1.1.1

updated 17 Sep 2026

Users

monthly, 2 years

Latest, 15 Oct 2026: 281 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years

Latest, 15 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 sGTM - add X-Gtm-Server-Preview Header

GA4 & Server-Side Tag Manager debugging helper. This tool helps debug your tracking setup with two key features: 1. It adds the X-Gtm-Server-Preview header to all requests. While there are other "add header value" plugins available, they can cause issues if left enabled, leading to unpredictable behavior when working on another sGTM. This extension includes an auto-deactivation feature: it automatically disables itself after one hour, ensuring a seamless and hassle-free debugging experience. 2. It adds a _dbg=1 parameter to all GA4 requests to enable debug mode for all GA4 requests, making it very simple to debug GA4. TL;DR: Add a sGTM preview header value to all requests or enable debug mode for GA4.