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79 ratings

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Debug and test tag management (Google Tag Manager, DTM, Tealium) and analytics implementations.

dataslayer adds a panel to Chrome Developer Tools that monitors tag management data layers and displays changes in an easy-to-read, user-friendly format. Supported TMS/variables include: - Google Tag Manager dataLayer variable - Adobe Launch rules and data elements - Adobe DTM page load rules and detection - Tealium data layer - TagCommander data layer - custom data layers (any variable represented as a JavaScript object) dataslayer supports multiple data layers / GTM containers on a single page, including those in embedded iframes. dataslayer also decodes and displays tags (including pageviews, variables, and click events) from: - Google Analytics (including App + Web, Universal Analytics / analytics.js, dc.js, and ga.js) - Adobe Analytics / Omniture SiteCatalyst - Floodlight If you're using a beta or dev channel of Chrome, you can optionally enable blocking of captured tags to prevent data pollution. For feature requests and bug reports, please either use the 'Send Feedback' option in the Chrome Web Store or reach out directly to Source lives at if you'd like to contribute!

4.6 out of 579 ratings

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Nick VincentFeb 13, 2024

DONT USE THIS TOOL, it displays false results that didn't happen. Example: I'm on URL A and I click a button. -According to Google Tag Assistant (essentially the word of God), this click happened on URL A (duh, of course it did). -According to Dataslayer? Oh it happened on URL B, the place that the button click took me to. Thats literally impossible, but Dataslayer doesnt care. I didnt realize that the name meant that the data itself would be slayed until it's no longer usable. I've tried t... Show more

3 out of 3 found this helpful
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Joe MarshallNov 30, 2023

Lets you see events from previous sessions, which is what I needed it for.

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sammy boyMay 2, 2022

if its got a Slayer background image, it worth it

4 out of 4 found this helpful


  • Version
  • Updated
    June 5, 2021
  • Size
  • Languages
    English (United States)
  • Developer
    51 Java St Brooklyn 11222 USA
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.


The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes


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