OpenCorp

Is your tracking counting everything twice?

Paste your site's address. You'll see every analytics and ad tag it loads, including the ones hidden inside Google Tag Manager, and what's installed twice, dead, or firing without cookie consent. Free, no login, about ten seconds.

What it flags

GA4 installed twice
The same property in your code and in Tag Manager, or configured twice. Page views and conversions double.
Pixels that start twice
A Meta Pixel in the page and again in Tag Manager sends every PageView twice, and ad costs per result look better than they are.
Ad tags without consent
Meta, Google Ads or TikTok loading with no cookie banner and no Google Consent Mode.
Leftovers
Universal Analytics code (dead since July 2024), Tag Manager containers that no longer load, and old GA4 properties still collecting.

Questions

What does it check?
It reads your page's HTML, your site's own JavaScript files (where apps built with Next.js or React usually start analytics) and every Google Tag Manager container the page loads (containers are public files). It lists GA4, Google Ads, Meta, TikTok, LinkedIn, X, Reddit, Pinterest, Microsoft, PostHog, Umami, Vercel, Hotjar, Clarity and other tags, plus cookie consent tools, then flags setups that usually break your numbers.
Why would GA4 count my visits twice?
The most common cause is the same GA4 property installed twice: once in the site's code and once in Tag Manager, or with two gtag('config') calls. Each copy sends its own page view, so traffic and conversions look doubled.
Do I need a cookie banner?
If visitors from the EU or UK reach your site and you run ad tags (Meta, Google Ads, TikTok and similar), they have to agree before those cookies are set. Google also needs Consent Mode v2 to keep ads measurement and remarketing working for EEA traffic.
What can't it see?
Tags that third-party scripts add after the page loads, tags that only fire after a click, and what happens after someone accepts the cookie banner. That needs a real browser, which is what the full check will do.
Is it free?
Yes. No account, nothing stored except anonymous usage counts. The page you check is fetched once from our server.