How to check a site's analytics
- Enter a website, or a full URL to check a specific page.
- Read the list. Each tool found is grouped as analytics, product analytics, session replay, tag manager or ad pixel, with a note when it works without cookies.
- Check the tag IDs. Google's G-, GTM- and AW- IDs in the page are listed, so you can spot one that shouldn't be there.
How detection works
Every analytics tool leaves a trace in the page: a script from its own domain, like plausible.io/js/script.js, or a call only it makes, like gtag('config', 'G-...'). The checker fetches the page the way a browser does and matches those traces.
It reads the HTML your server sends, before any JavaScript runs. That means:
- Tools loaded by Google Tag Manager are not seen, only the Tag Manager container.
- Tools loaded after cookie consent are not seen, because nobody has consented yet.
- Tools added by JavaScript later in the page's life are not seen.
So an empty result doesn't prove a site has no analytics. A result does prove the tool is there.
Cookie-based and cookieless analytics
| Type | Examples | Consent banner in the EU |
|---|---|---|
| Cookie-based | Google Analytics 4, Mixpanel, Amplitude, Hotjar, ad pixels | Usually required |
| Cookieless | Plausible, Fathom, Simple Analytics, Umami, Cloudflare Web Analytics | Usually not required for the analytics |
| Depends on setup | Matomo, PostHog, Tag Manager | Depends on the settings |
Cookieless tools count visits without storing an ID in the browser. That is why many sites switch: no banner means no lost data from people who click "reject".
Why check your own site
- Leftover tags. Old Universal Analytics code, a pixel from an agency you stopped working with, or two GA4 IDs on the same page.
- Double counting. The same tool installed twice, once directly and once through Tag Manager.
- Privacy promises. If your policy says you don't use tracking cookies, make sure no ad pixel says otherwise.
- Speed. Every tag adds scripts and requests. Remove the ones nobody reads.
Why check a competitor's site
You see which tools they rely on, whether they run ads on Meta, Google, TikTok or LinkedIn, and whether they record sessions. It is all public: the same HTML any browser downloads.
NoirTrack is cookieless by default, counts people apart from bots, and ties every sale to the visit that brought it, in one small script.