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Google Analytics 4 in Homepage Source

Google Analytics 4 (GA4) is Google's event-based web and app analytics platform, the default analytics tag on a large share of the web.

9,897,422 estimated matches across 131,219,565 indexed homepages refreshed quarterly · September 2026

The source-code fingerprint

gtag/js?id=G- Search this footprint →

Pages load the GA4 library from googletagmanager.com/gtag/js?id=G-XXXXXXXXXX, so the string gtag/js?id=G- appears in the source of any site running a GA4 measurement ID.

Likely false positives: Also matched on sites that load gtag purely for Google Ads (AW-), the id=G- prefix keeps this specific to GA4 properties.

Stored source examples for Google Analytics 4

These examples matched gtag/js?id=G- in stored homepage source when the query was sampled on 2026-10-14. The sites may have changed since the source was captured. A match establishes a source reference; it does not confirm an active installation or code execution.

  • support.google.com ...3F8"></script><script src="https://www.googletagmanager.com/gtag/js?id=G-H30R9PNQFN" async="" nonce="jVe2HhEJNWEYuphIt3F8"></script><...
  • creativecommons.org ...hts.com/ -->\n\t\t\t\t\t\t\t<script src="//www.googletagmanager.com/gtag/js?id=G-J83GSCH0LS" data-cfasync="false" data-wpfc-render="false" t...
  • www.researchgate.net ...ync = 1;\n script.src = 'https://www.googletagmanager.com/gtag/js?id=G-4P31SJ70EJ';\n var referenceNode = document.getElementsByT...
  • about.me ...ics -->\n<script async src="https://www.googletagmanager.com/gtag/js?id=G-LE3EMX7RDC"></script>\n<script>\n window.dataLayer = window...
  • stackoverflow.com ... <script async src="https://www.googletagmanager.com/gtag/js?id=G-WCZ03SZFCQ"></script>\n <script>\n w...
  • transparencyreport.google.com .../script><script async src="https://www.googletagmanager.com/gtag/js?id=G-XQYF1YFYZF" nonce="TDCaLzpDKA3yZ3TaZYggNQ"></script><script ...
  • lnk.bio ...>\n\t\t\t\t\t\t<script async src="https://www.googletagmanager.com/gtag/js?id=G-N2VNE35MLW"></script>\n\t\t\t<script>\n\t\t\t\tconst cleanPath = wind...
  • www.fda.gov ...f-8" />\n<script async src="https://www.googletagmanager.com/gtag/js?id=G-273DTKB5QW"></script>\n<link rel="canonical" href="https://ww...
  • lifehacker.com ...ipt>\n\n\n\n<script async src="https://www.googletagmanager.com/gtag/js?id=G-7E851STSQZ"></script>\n<script>\n window.dataLayer = window...
  • metro.co.uk ... -->\n\t\t\t<script async src="https://www.googletagmanager.com/gtag/js?id=G-MYFQ9GLWWV"></script>\n\t\t\t<script>\n\t\t\twindow.metro = window.m...
  • www.acm.org ...t>\r\n\r\n <script async src="https://www.googletagmanager.com/gtag/js?id=G-RX448GM2EK"></script>\r\n <script>\r\n window.dataLayer = wi...
  • caniuse.com ...ript>\n\t\n<script async src="https://www.googletagmanager.com/gtag/js?id=G-8SCDSGDGKM"></script>\n<script>\n window.dataLayer = window.d...
  • mashable.com ... <script async src="https://www.googletagmanager.com/gtag/js?id=G-BPBF083TYP"></script>\n<script>\n window.globalGAInfo = {"p...
  • csrc.nist.gov ...> \r\n <script async src="https://www.googletagmanager.com/gtag/js?id=G-TSQ0PLGJZP"></script> \r\n <script>   window.dataLayer = ...
  • www.aljazeera.com ...165"></script><script async src="//www.googletagmanager.com/gtag/js?id=G-XN9JB9Q0M1"></script><script async src="//static.chartbeat.c...
  • www.pewresearch.org ...id="google_gtagjs-js" src="https://www.googletagmanager.com/gtag/js?id=G-JWLCYL52TJ" async></script>\n<script id="google_gtagjs-js-aft...
  • www.fbi.gov ...s) -->\r\n<script async src="https://www.googletagmanager.com/gtag/js?id=G-DBEM2FVVRF"></script>\r\n<script>\r\n window.dataLayer = window...
  • www.producthunt.com ...><link rel="preload" href="https://www.googletagmanager.com/gtag/js?id=G-WZ46833KH9" as="script"/><meta name="theme-color" content="#...
  • www.snapchat.com ...elmet="true" async="" src="https://www.googletagmanager.com/gtag/js?id=G-DPDHJB4310"></script><script data-react-helmet="true">\n w...
  • jsfiddle.net ...js) -->\n<script async src="https://www.googletagmanager.com/gtag/js?id=G-DG76L8EKG3"></script>\n<script>\n window.dataLayer = window.d...
  • people.eecs.berkeley.edu ...js) --> <script async src="https://www.googletagmanager.com/gtag/js?id=G-LC250GQGVR"></script> <script> window.dataLayer = window.dat...
  • cutt.ly ....com">\r\n<script data-src="https://www.googletagmanager.com/gtag/js?id=G-EYXHB4M7KS" type="text/plain" data-cookiecategory="analytics...
  • www.mapbox.com ... -->\n<script async="" src="https://www.googletagmanager.com/gtag/js?id=G-K0D3QK4GKE"></script>\n<script>\n window.dataLayer = window.d...
  • enterprisemarketingportal.google .../script><script async src="https://www.googletagmanager.com/gtag/js?id=G-V9KKCT1BF9" nonce="5eGh5cEcKGpE4LjidpgKHQ"></script><script ...
  • webaim.org ...log">\n\n\t<script async src="https://www.googletagmanager.com/gtag/js?id=G-Y41PF8WV9X"></script>\n\t<script>\n \twindow.dataLayer = window...
  • pagespeed.web.dev ....js) --><script async src="https://www.googletagmanager.com/gtag/js?id=G-S8N9N15MT1" id="bw-ga" nonce="Fh4-oNrmYmfj0psEHH1NjA"></scri...
  • nvd.nist.gov ...script>\n var scripts = [['https://www.googletagmanager.com/gtag/js?id=G-4KKFZP12LQ', '', true, false]];\n scripts.forEach(function(s...
  • openid.net ...id="google_gtagjs-js" src="https://www.googletagmanager.com/gtag/js?id=G-NF8HNLNJJE" async></script>\n<script id="google_gtagjs-js-aft...
  • gamehistory.org ...id="google_gtagjs-js" src="https://www.googletagmanager.com/gtag/js?id=G-4ZPZBFRVR6" async></script>\n<script id="google_gtagjs-js-aft...
  • pastebin.com ... <script async src="https://www.googletagmanager.com/gtag/js?id=G-S72LBY47R8"></script>\n <script>\n window.dataLayer = ...

Showing 30 checked source examples. The headline is estimated matches. Open the full ranked list, inspect the matched source, and export the domain list →

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How this works

The headline distinguishes candidate upper bounds (index prefilter), estimated matches (a projection from checked samples) and verified matches (an exact count established by the engine). The index contains 131,219,565 homepage documents, one homepage per hostname, including subdomains. The source index was promoted 2026-09-22 and follows a quarterly rebuild schedule. The sample date is when this query was checked against the stored index, not a new crawl of each example site.

Comparing adoption across tools? The Web Technology Adoption Report ranks the most common tags in the index side by side.