Google Tag Manager checker
Google Tag Manager loads and manages other marketing tags from one container without code changes. Enter any website below to check whether it uses Google Tag Manager. The check is free and needs no signup.
Enter a website address and press Scan.
Detection reads the page HTML, response headers and cookies. Tools that load later or run only on the server can be missed.
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How we detect Google Tag Manager
We look for the googletagmanager.com gtm.js loader or ns.html frame, or a GTM- container id.
Detection reads what the page sends to a visitor. A site can hide Google Tag Manager, or use it only on the server, and then we can't see it.