Tag Manager
Whether a container is installed, and whether there’s more than one, which usually means leftovers.
What tracking does your site actually have?
Enter a web address. In a few seconds you’ll see which tags are on the page, which are missing and which look like trouble. Free, and nothing you enter is kept.
Check any website’s tracking.
Enter the address of any public page: yours, a competitor’s or a client’s. The checker reads the page and its Tag Manager container and reports what it finds in plain English.
Tracking checker
A look from the outside. Nothing you enter is kept.
It reads one public page, the way a browser would. It can’t see inside your analytics or ad accounts.
Having a look…
Reading the page and its Tag Manager container. This takes a few seconds.
This is a look from the outside.
It shows what’s on the page, not whether the numbers behind it are right. An audit traces real enquiries and sales through every system.
What it looks for.
Six things that tell you most of what you need to know about a site’s measurement, readable from outside in a few seconds.
GA4
Whether Google Analytics 4 is present, how it’s loaded, and whether two IDs suggest double counting.
Dead code
Old Universal Analytics tags that stopped collecting data in 2023 and are still slowing the page.
Ad pixels
Meta, Google Ads, LinkedIn, TikTok and Microsoft tags, so you can see which platforms hear about your conversions.
Cookie consent
Whether a consent tool or Google’s consent settings are in place alongside the tracking.
Server-side tagging
Signs that tags are served from your own domain, which recovers data that browsers and ad blockers discard.
Fair things to ask.
What does it actually check?
It reads the public source of the one page you enter, plus any Google Tag Manager container that page loads, and looks for known tracking tags: Tag Manager, GA4, old Universal Analytics, advertising pixels, consent tools and signs of server-side tagging.
What can’t it see?
Anything that only loads after a visitor accepts cookies, tags fired by a server, and whether a tag is configured correctly. It can tell you a tag is present. It can’t tell you the numbers are right. That takes an audit.
Do you keep the address I enter?
No. The address is used to fetch the page, the result is sent back to your browser, and nothing is stored.
It says GA4 is missing, but I know it’s installed.
It may be set to load only after consent, or through a method the checker doesn’t recognise. Treat “not found” as “not visible from outside”, and get in touch if you want it looked at properly.
Want the numbers checked properly?
The checker shows what’s on the page. An audit tells you which of your numbers to trust, and what to fix first.