Detect Google Tag Manager
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Detection looks at script sources, javascript globals, html markup across 7 fingerprint rules among the site's public responses.
Websites using Google Tag Manager
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Signal classes
PluginView evaluates public page signals in these classes when identifying Google Tag Manager. Individual fingerprint rule bodies are proprietary and are not published.
- Script sources
- JavaScript globals
- HTML markup
Example public indicators for Google Tag Manager
Illustrative indicators derived from public catalog metadata for Google Tag Manager. A live scan may match additional proprietary rules beyond these examples.
- googletagmanager.com/gtm.js
- .googletagmanager.com/
- google_tag_data
- google_tag_manager
- googletag
- googletagmanager.com/ns.html></iframe>
- <!-- End ?Google Tag Manager -->
What a detection means
- Establishes
- The listed vendor-controlled browser component was present and active on the scanned page at scan time.
- Does not establish
- It does not prove a sitewide installation, current commercial contract, backend-only use, exclusive use, or production transaction volume.
Minimum proof rule
Observe a live browser request, loaded script, or iframe to the listed unique vendor endpoint. Source-text-only matches do not qualify.
Best pages to check: All pages; inspect container load
How to check a site for Google Tag Manager
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Google Tag Manager signals (prefer: All pages; inspect container load).
- 2. PluginView reads only public responses (script sources, javascript globals, html markup) and scores them against the Google Tag Manager signature set (7 rules).
- 3. Review the confidence score and text explanation for Google Tag Manager on the results page.
FAQ: detecting Google Tag Manager
- Can PluginView detect Google Tag Manager without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for Google Tag Manager — typically script sources, javascript globals, html markup. It does not bypass authentication or paywalls.
- What category is Google Tag Manager?
- Google Tag Manager is classified under Tag managers, Analytics, Product Intelligence & Monitoring in the PluginView directory.
- How many fingerprint rules cover Google Tag Manager?
- This reference currently tracks 7 fingerprint rules across script sources, javascript globals, html markup. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses Google Tag Manager?
- Illustrative public indicators for Google Tag Manager include googletagmanager.com/gtm.js; .googletagmanager.com/; google_tag_data. A live scan may match additional proprietary rules beyond these examples.
- Which pages are best for detecting Google Tag Manager?
- For Google Tag Manager, start with: All pages; inspect container load.
