Google Tag Manager – A Guide to Verify Installation

Welcome to our exploration of Google Tag Manager (GTM) and the essential steps to ensure its proper installation on your website.


Whether you’re a seasoned developer or a marketing enthusiast, confirming that GTM is seamlessly integrated is crucial for accurate data tracking and efficient tag management.

Methods to Verify GTM Installation

1. Checking Page Source Code

  • One of the fundamental ways to verify GTM installation is by examining the page source code. Here’s how you can do it:


  1. Right-click on your webpage and select “View Page Source” or simply press Ctrl + U (Windows/Linux) or Cmd + Option + U (Mac).

  2. Look for the GTM container ID by searching for the term “GTM-” in the source code.

  3. The container ID typically appears within the GTM script tag, providing a clear confirmation of GTM’s presence on the page.

2. Using Google Tag Assistant Legacy Extension

  • Google’s Tag Assistant Legacy extension for Chrome is a handy tool for a quick check:


  1. Install the extension from the Chrome Web Store.

  2. Navigate to your website and click on the Tag Assistant icon in your browser.

  3. Enable the extension and it will scan the page and display the status of Google Tag Manager. A green icon signifies a successful installation.

3. Previewing the Website in Google Tag Manager

Preview mode within the GTM interface offers a real-time look at how tags fire on your website:


  1. Access Google Tag Manager and select your container.

  2. Click on “Preview” in the upper right corner.

  3. Visit your website, and a debug console will appear in GTM, indicating if the data layer is loading correctly.

Additonal Tips and Troubleshooting

Ensuring a smooth GTM installation involves attention to detail. Consider these additional tips:


Placement of Container Code: Confirm that the GTM container code is placed within the required section of your website for optimal performance.


Common Issues: Check for common issues like typos or missing characters in the container code. These seemingly minor errors can disrupt GTM functionality.



Verifying your Google Tag Manager installation is a proactive step toward maintaining data accuracy and streamlining your tracking efforts. By utilizing these methods, you empower yourself to troubleshoot potential issues and guarantee a seamless integration of GTM on your website.

And Finally…

Good Luck, and always, we’re here to help if you need us.