Here are the two Chrome Extensions I’ve written.

  • GTM Sonar - Debug your on-site JavaScript to see if it’s compatible with the event listeners Google Tag Manager leverages

  • Internalize for Google Analytics - Send a Custom Dimension hit at the click of a button. This tool is intended to annotate traffic in a certain way, letting you filter it out or process it in any way you choose

GTM Sonar is especially useful for debugging potential problems with interfering JavaScript.

Related posts: – Internalize for Google Analytics v1.0Google Tag Manager Sonar v1.2


Feel free to send me any feedback relating to the tools. I don’t do extensive testing, nor are the tools especially optimized performance-wise. These are issues I would love to tackle had I more time, but I’m really grateful for any ideas, feedback, or criticism you might want to throw my way.