This tool provides an easy method for marketers and developers to validate the data layer and tracking events in real-time on their site.

In this article:

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How It Works

The Universal Tag (UTAG) Debugger is a tool used for validating the Universal Data Object and event tracking calls. The UTAG Debugger is similar to Web Companion, with the difference being that it is focused on the data layer and the data captured by each tracking event within utag.js.

The data objects displayed in the tool are captured after extensions scoped to "All Tags - Before Load Rules" and before extensions scoped to "All Tags - After Load Rules". Learn more about order of operations.

Install the Tealium Tools Extension

To use this tool, you must first add it your Chrome browser using the Tealium Tools extension. To install this extension on Chrome or Firefox, see Tealium Tools Browser Extension.

Paste JSON to Custom Tools

After you have installed the browser extension, use the following steps to cut and paste the JSON to your Custom Tools:

  1. Click the Tealium icon in the upper right of your browser to open Tealium Tools.
  2. Click the Custom Tools tab.
  3. From the Custom Tools tab, cut and paste the following JSON:
        "id" : "teal.sol.debug",
        "title" : "UTAG Debugger",
        "description" : "Universal Tag Debugger",
    "no_ui" : true, "scripts" : { "utag_monitor" : { "js" : "void(\"\",\"utagmon\",\"width=600,height=600,location=0,menubar=0,status=1,toolbar=0,resizable=1,scrollbars=1\").document.write(\"<script language='JavaScript' id='utagmon' src='//\"+Math.random()+\"'></\"+\"script>\"));", "auto_inject" : true } } }
  4. When complete, a new button with the tool name will display under the "Custom Tools" tab.

Create a Bookmarklet

You can optionally create a bookmarklet from which to launch the tool, as follows:

  1. Create a bookmarklet using the following code:
    resizable=1,scrollbars=1").document.write("<script language='JavaScript' id='utagmon'
    +Math.random() +"'></"+"script>"))
  2. Drag and drop the bookmarklet onto your Bookmarks bar.
    UTAG Debugger Bookmarklet Instructions.jpg
  3. Your bookmark is now ready to use.

Using the UTAG Debugger Tool

Use the following steps to begin using the UTAG Debugger tool:

  1. Navigate to your desired website.
  2. Open Tealium Tools and click the Custom Tools tab.
  3. Click the Ud button.
    The Universal Tag Debugger tool displays.
    If you created a bookmark to use, simply click the bookmarklet in your toolbar.Screen Shot 2020-10-12 at 11.48.29 AM.png

    The top section displays which utag.js file was detected on the page and contains the following:

    • account/profile/environment path)
    • the version of utag,
    • a number of display options for changing what data will display in the viewing area.


The following options are available to help you use and navigate the tool:

  • Bookmarklet – you can re-save your display options by dragging the bookmarklet link from the top-right of the pop-up back to your toolbar
  • Events – the tracking events detected on the page will either be "view" events or "link" events, toggle these checkboxes to filter the display
  • Show Data – the UDO data will always be displayed, but additional data sources collected by utag can be displayed by toggling these checkboxes

Data Variables

The following data variables are available:

Screen Shot 2020-10-12 at 11.52.33 AM.png

  • iQ – built-in data collected by utag.js, including DOM attributes and variables prefixed with "ut." eg. "ut.profile"
  • Cookie – all first party cookies available in the page
  • JS Page – JavaScript page variables defined in your data layer (variables other than utag_data)
  • Querystring – query string variables found in the URL
  • Meta – all meta data values available in the page
  • AudienceStream – variables populated by data layer enrichment

Event Display Area

The event display area automatically updates as you navigate or trigger in-page events. New pages are listed as "utag_view" events and in-page events are listed as "utag_link" events.


The example above shows two pages visited and one event triggered. This results in two utag_view entries and one utag_link, which are labeled #1, #2, and #3 in the image. The most recent activity always displays at the top.

Version history
Last update:
‎10-27-2020 07:21 AM
Updated by: