GTM Sonar
Debug your page template to see if it works with Google Tag Manager's auto-event listeners.
What is GTM Sonar?
GTM Sonar is a Chrome extension aimed at helping web developers debug their page templates. Specifically, this extension helps in ensuring compatibility of these templates with Google Tag Manager's auto-event listeners. Once installed, users can choose different listeners to activate on the page - click listener, link click listener, or form submit listener. The GTM Sonar extension is tab-specific, making the debugging process tailored for each individual page tab. Additionally, it provides a badge icon count for each event pushed into the debugDL array, thereby enabling users to view array contents by simply opening the JavaScript console in Chrome and typing 'debugDL'.

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Summary
The GTM Sonar can be used to debug the page template and its compatibility with Google Tag Manager's listeners.
TABLE OF CONTENTS
- OVERVIEW
- HOW TO USE IT
- TO-DO
- VERSION HISTORY
- OVERVIEW
Once you install the extension (and reload your page), clicking the red target in the extension pane will open a pop-up.
In this pop-up, you can choose which listener to activate on the page.
User reviews
User reviews summary
Pros
- Excellent tool for debugging
- Makes checking tags much easier
- Convenient for GTM testing
- Useful plugin
- Provides insight on what's going on under the hood
Cons
Most mentioned
- Great tool for debugging
- Convenient for testing
- Useful plugin
Safety
Risk impact
GTM Sonar may not be safe to use and it requires some risky permissions. Exercise caution when installing this extension. Review carefully before installing.
Risk likelihood
GTM Sonar has earned a good reputation and can be trusted.
Screenshots
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