Pixels installed twice
GA4 or the Meta pixel set up in your theme, Tag Manager and a Shopify app at once. Purchases get counted twice and ROAS looks better than it is.
Free tracking scan for online stores and lead-gen sites
Know your tracking works.
Every day.
Paste your site. In 20 seconds you'll see whether GA4, the Meta pixel, TikTok, LinkedIn and Tag Manager are installed right, or quietly double counting and missing sales and leads. Shopify, WooCommerce, WordPress, Webflow and custom sites.
- Loading your site
- Reading plugins, apps and pixels
- Opening your Tag Manager containers
- Checking for duplicates and gaps
The problems that cost you money, found in seconds.
Of five well-known Shopify brands we scanned on 8 November 2026, two had GA4 installed twice and three still had old Universal Analytics code in place. Big teams miss these. So do agencies.
Purchases nobody sees
Shopify checkout doesn't run theme code. If a pixel lives only in your theme or Tag Manager, your ad platforms probably never see a sale.
Broken Tag Manager
A container that's empty, deleted or never published, or two containers firing the same tags. We open every container your site loads.
Consent gaps
No cookie banner, or Google Ads running without Consent Mode, which shrinks your remarketing audiences and conversion modelling.
Leftovers and strays
Universal Analytics still loading years after it stopped working, or a second GA4 property splitting your data.
Plugins fighting each other
On WordPress and WooCommerce, two plugins (or a plugin and Tag Manager) adding the same pixel is the most common way sales get counted twice.
Leads your ads never see
Calendly, Typeform and HubSpot forms with no lead conversion behind them. LinkedIn and Google Ads then optimise for clicks, not pipeline.
Silent breakages
The big one. A theme update or app install removes a pixel and nothing tells you, until the ad spend report looks wrong weeks later.
What the full report looks like.
The free scan tells you how many problems your site has and shows the worst one. Subscribers get the full report: every problem, where it's installed and the fix. This is a real one, from a well-known Shopify brand on 8 November 2026, with the name and IDs hidden. Their GA4 was installed three times.
Loading the sample report…
Tracking breaks quietly. Now you'll hear about it.
Subscribe a site and we check it every day. When something changes, you get one short email that says what broke and how to fix it.
Scan and subscribe
The free scan shows how many problems your site has. Subscribe in one click to unlock the full report and start the daily checks.
We check every day
Every tag ID, app pixel, custom pixel, Tag Manager container and consent tool, compared with yesterday.
You hear the same day
An email the moment something disappears or a new problem shows up, plus a one-line summary every Monday.
Today's check of yourstore.com found a change that affects your tracking:
- Meta pixel 1234567890 (Shopify app) disappeared from your site.
- The Facebook & Instagram app pixel is no longer installed.
Also changed: Tag Manager container GTM-ABC1234 was published (version 41 → 42).
Less than one wasted morning of ad spend.
When a purchase pixel breaks, Meta and Google keep spending and optimise on bad data until someone notices. On a store spending $100k a month, one unnoticed week costs far more than a year of Pixel Check. The scan is free. Monitoring catches the break the day it happens.
For one store or site
Monitor
$79/month
- The full report: every problem, where it's installed and the fix
- Daily check of every tag, app pixel and Tag Manager container
- Same-day email when anything changes or breaks
- Monday summary, so you know it's running
- Shareable report for your developer or agency
For stores spending on ads every day
Pro
$299/month
- Everything in Monitor
- A daily live check in a real browser from the US (UK and Australia soon)
- Visits as someone who accepts cookies, rejects them and hasn't chosen yet
- Catches events firing twice, missing Meta event IDs and missing product IDs
- Alerts in Slack, Teams or email, plus a monthly report
For agencies · 10 client sites
Agency
$499/month
- Agency Monitor: Monitor on up to 10 client sites
- Agency Pro: Pro on 5 client sites for $995/month ($199 a site)
- Add, remove or swap sites any time
- Reports you can forward to clients
- Bundle it into your retainers at your own price
Founding offer: the first 10 customers get 40% off for 12 months, applied at checkout. 14-day money-back guarantee on the first payment.
Billing by Lemon Squeezy, our reseller: card or PayPal, sales tax and VAT handled, receipts by email.
Coming next · 3 founding places
Reconcile
$799/month
Every morning, yesterday's real orders or leads from your store or CRM next to what GA4, Meta and Google Ads recorded. An alert when the gap moves. Daily totals only, no customer data. The 3 founding customers pay $499/month, locked for 12 months.
Spending $500k+ a month on ads
Enterprise
from $2,000/month
Several sites and markets, a test of every Tag Manager change before it goes live, a quarterly review and first call on fixes. Quoted for your setup.
Questions
Do you need access to my store, Google or Meta accounts?
No. Pixel Check reads the same public pages and Tag Manager files every visitor's browser downloads. Nothing to install, no logins to share.
Does it work if my site isn't on Shopify?
Yes. It recognises WooCommerce and WordPress tracking plugins, BigCommerce, Webflow, Squarespace, Wix and custom sites, and B2B lead tools like HubSpot, Marketo, Calendly and Typeform. It finds GA4, Google Ads, Tag Manager, Meta, TikTok, LinkedIn, X, Reddit, Pinterest and consent tools anywhere. Shopify-only checks (app pixels, checkout) run only on Shopify.
What can't it see?
Monitor reads your pages and containers, not live traffic (Pro adds a live browser check, but places no orders). Neither can confirm a purchase event fires with the right value or read the code inside Shopify custom pixels, and headless storefronts that load tags from their own JavaScript are only partly visible. The report tells you when that's the case, and we don't suggest subscribing a store we can't watch properly.
How is this different from Google Tag Assistant or Meta Pixel Helper?
Those check one page in your browser when you remember to look. Pixel Check checks the whole setup every day and emails you when it changes, which is when tracking actually breaks.
Can I cancel anytime?
Yes. Every email has a link to your billing page, where you can cancel in two clicks. Monitoring runs until the end of the month you paid for, and the first payment is covered by a 14-day money-back guarantee.
What's the difference between Monitor and Pro?
Monitor reads your pages and Tag Manager containers every day, the same files every visitor downloads, and tells you when the setup changes. Pro also visits your site daily in a real browser from the US (UK and Australia soon), as a visitor who accepts cookies, rejects them and hasn't chosen yet. It records what actually fires, so it catches events firing twice, missing Meta event IDs and ad tags that ignore a visitor's choice.
I manage several sites. How do the Agency plans work?
After checkout you get a private link to your sites page. Add your client sites (10 on Agency Monitor, 5 on Agency Pro); each one gets its first report by email straight away and a daily check from then on. Swap them whenever a client comes or goes. Need more sites? Email us.
Will scanning slow down or affect my store?
No. A scan loads your home page once, like a single visitor. We don't fire your pixels, so your analytics and ad data are untouched.
Built by a tracking engineer
I'm Matt Klette. I'm a contract tracking engineer for a US apparel brand, working in Google Tag Manager, server-side tagging and the Meta Conversions API every day. I built Pixel Check because the most expensive tracking bugs I find are the ones that broke quietly months earlier. Questions or a strange result? Email [email protected] and I'll answer myself.