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GTM Phantom

ExtensionDeveloper Tools5 users
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Item media 2 (screenshot) for GTM Phantom
Item media 1 (screenshot) for GTM Phantom
Item media 1 (screenshot) for GTM Phantom
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Overview

Inject - or replace - your Google Tag Manager container on any site. Paste the snippet once, Phantom does the rest.

πŸ‘» Load YOUR Google Tag Manager container on any website - a client's staging site, a third-party-hosted checkout, a page whose container is broken or missing. Paste the snippet once; GTM Phantom injects it on every page load of the domains you choose. ⚑ WHAT IT DOES 🎯 Inject on any site: your snippet runs in the page (MAIN world) at document_start - the same effect as pasting it in the site's <head>. πŸ“‹ Multiple rules: one per site, each with its own snippet. Pause, edit, delete independently. 🌐 Subdomain coverage per rule (*.example.com). πŸ”„ REPLACE MODE: block the container(s) the site already loads at the network level, so your container runs INSTEAD of the site's one - no double tags, no double hits. Only the GTM id found in your snippet stays allowed, and blocking is active only while your rule is actually injecting. 🟣 Toolbar badge: ON on every covered tab. ♻️ Auto-reload of open tabs when you save a rule. πŸ‘₯ BUILT FOR Web analysts, tag-management consultants, agencies and developers who need their own container running on a page they don't control yet. πŸ›‘οΈ HOW IT WORKS (AND WHY IT'S POLICY-COMPLIANT) Phantom never ships or builds a GTM loader itself. You paste the container snippet exactly as Tag Manager hands it out, and Phantom registers it through chrome.userScripts - the Chrome API made precisely for running user-provided scripts. The code that runs is yours, not the extension's. That's also why Chrome asks you to enable "Allow user scripts" once on the extension's details page (Chrome 138+). πŸ”’ PRIVACY No analytics, no remote calls, no accounts. Rules and snippets live in chrome.storage.local and never leave your browser. Host access is granted by you, per domain, when you save a rule. βœ… VERIFYING On a covered page, DevTools β†’ Object.keys(google_tag_manager) shows your GTM-XXXX. Tag Assistant and GTM preview mode work normally.

Details

  • Version
    1.0.0
  • Updated
    September 3, 2026
  • Offered by
    Guido Barbacci
  • Size
    24.51KiB
  • Languages
    English (United States)
  • Developer
    DO Web Analytics
    Via Luigi Pirandello 5 Gubbio, PG 06024 IT
    Email
    info@guidobarbacci.com
  • 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.

Privacy

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The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

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

Support

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