Tag Inspector is a free tracking pixel detector for Chrome. Check if Meta Pixel is working, verify GA4, inspect Google Tag Manager and confirm your LinkedIn Insight Tag, on any page, in one click.
Add to Chrome, it's freeFree. No account. Nothing ever leaves your browser.
A broken Meta Pixel means no conversions recorded and no signal for the algorithm to optimise on. A double-firing one inflates your numbers and quietly wrecks your bidding. Either way, the ad platform still takes the money.
A redesign, a new plugin, a developer tidying up: any of them can knock out a tag without anyone noticing. You find out weeks later, when the report looks wrong and nobody can say since when.
If pixels load before your consent banner gets an answer, you may be collecting data you have no permission to collect. GDPR regulators have stopped finding that amusing.
Open any site and Tag Inspector lists every tracking platform it finds: Meta Pixel, GA4, Google Tag Manager, LinkedIn and nine more, plus the big cookie-consent platforms. It extracts the actual pixel and container IDs, so you can confirm the right account is wired up, not just that something is.
The event stream shows PageView, AddToCart, Purchase and the rest the moment they fire, as you click through the site. Duplicate events stand out immediately, so double-fires get caught before they distort a single report.
GTM only knows what the dataLayer tells it, and the dataLayer is where most tracking bugs hide. Tag Inspector shows you its contents in a readable view, so you can check that the values your tags depend on are really there.
When something is misconfigured, you get a warning a human can act on: "this pixel fired twice on one page load", not an error code and a shrug. For Google Analytics it works as a GA4 tag checker that tells you why, not just what.
Tag Inspector recognises the major cookie-consent platforms (CMPs) and shows which one is running alongside your tags. You can see at a glance what fires around the consent banner, which is exactly the part auditors ask about.
There is something absurd about installing a privacy tool that phones home, so this one doesn't. All analysis happens locally in your browser, on the page you are looking at, and nowhere else.
No data collection, no account, no sign-up, and only the minimal permissions needed to read the page in front of you. What Tag Inspector sees stays on your machine.
The full details are in the privacy policy, which is short, because there is not much to disclose.
You are about to put £5,000 behind a campaign: run Tag Inspector on the landing page first and confirm the Meta Pixel and GA4 tags fire once, correctly, with the right IDs.
Audit a prospect's site in five minutes and walk into the pitch with a list of concrete tracking problems, which beats "we should probably look at your setup".
Use it as a Google Tag Manager debugger: watch the dataLayer while you click through a flow and see exactly which push is missing the value your conversion tag needs.
The free version tells you what is on the page. Pro will tell you what to do about it.
Join the waitlist, early subscribers get founding pricing.
No spam and no newsletter: one email when Pro launches, and that's the lot.
Yes. Everything the extension does today, tag detection, live events, dataLayer inspection and health checks, is free and stays free. A paid Pro tier is coming later with optional extras such as PDF audit reports and a PII leak scanner, but the core tool will never move behind a paywall.
No. All analysis runs locally inside your browser and nothing is ever sent to a server, ours or anyone else's. There is no account, no sign-up and no analytics inside the extension itself.
To detect the tags on a page, Tag Inspector has to be able to read that page, and since you might audit any site, it asks for access to all of them. It reads the page you are viewing and it never sends anything anywhere. That is the entire use of the permission.
Tag Inspector detects 13+ platforms: Meta Pixel, Google Analytics 4, Google Tag Manager, Google Ads, LinkedIn Insight Tag, TikTok, Twitter/X, Pinterest, Snapchat, Bing UET, HubSpot and Hotjar, plus the major cookie-consent platforms (CMPs). For each one it extracts the actual tag or container ID so you can verify the right account is connected.
Yes, GTM is one of its main jobs. Tag Inspector detects GTM containers with their IDs, inspects the dataLayer so you can see what the container actually receives, and shows the tags firing through GTM in the live event stream. That makes it a practical Google Tag Manager debugger as well as a pixel detector.
Tag Assistant covers Google products; Tag Inspector covers 13+ platforms including Meta Pixel, LinkedIn, TikTok and Pinterest, so it works as a pixel helper alternative across your whole stack. It also streams events live as they fire, explains misconfigurations in plain English rather than error codes, and shows which consent platform is running. If your tracking extends past Google, it shows you the rest of the picture.
Thirty seconds to install. Considerably faster than explaining a broken pixel to a client.
NUVIX builds focused, free tools for marketers and makers: small, sharp and doing one job properly. Tag Inspector checks the tags; its siblings handle the rest of the workflow.
Need hands-on help with your tracking setup? Get in touch: info@nuvix.studio