Free website tracking checker
Find your tracking gaps in seconds. Then we fix them.
Sonar checks up to 100 pages and shows exactly where your tracking breaks, what it costs you, and how to fix it. Fix it yourself, or let Dolphin Analytics fix it for you.
- No login needed
- Free scorecard
- Full report by email
80/100 Healthy
Tags fired before consent
Tracking fires before visitors have made a consent choice, which is a GDPR/PECR compliance risk.
Axon Garside 
connective3 
AKQA 
WPP 
Omnicom 
Toyota 
Volvo 
Cedar 
Preqin 
Mediahub 
Tesco 
Heidi 
ElevateJet 
Illumicrate 
Octopus EV 
Noisy Beast 
Incisive Media 
Boltahead 
Robot Zebra 
Pixated 
Passionfruit 
Ada Ventures How it works
- 01
Scan
Paste your URL. Sonar checks up to 100 pages like a real visitor. No login, no install.
- 02
See your gaps
A score out of 100, every problem ranked, and what each one costs you.
- 03
Pick your route
Fix it yourself, or send the report to us.
- 04
We sort the fix
We set up your tracking for you, or give you the free guides to fix it yourself.
See it in action
Watch Sonar check a coffee retailer's site in 40 seconds: what it finds, what each problem costs you, and how it gets fixed.
What you gain by fixing your tracking
Ad spend that works harder
Google and Meta learn from the conversions they receive. Send them every real sale, once, and they bid on the people who buy.
Numbers you can trust
Every page tracked, every visit counted once. Your reports show what really happened, so budget decisions rest on facts.
Less consent risk
Nothing fires before a visitor chooses, and their choice reaches every tool. That's the risk complaints and fines come from.
This is what you get back
Not a list of tags. Every problem says what it costs you, how many points fixing it adds, and the evidence behind it.
Tags fired before consent
If a visitor refuses, Google and Meta already have their data. That is the kind of breach complaints and fines come from.
Score impact: +5 points when fixed.
Is your tracking on all your pages?
- GA4Every page
- Google Tag ManagerEvery page
- Meta PixelEvery page
From the same scan: all three on all 100 pages. A tool that misses pages misses the sales on them.
Server-side setup
- Meta Conversions APISigns seen
- Server-side GA4Not observed
- Google tag gatewayNot observed
We only report what we can see from outside.
Six checks. One fix list.
Google Analytics 4
Whether GA4 is on every page and firing once, not twice.
Google Tag Manager
The containers running on your site and what they load.
Ad pixels
Meta and Google Ads, so your campaigns learn from real conversions.
Consent
What fires before a visitor chooses, and whether their choice reaches your tools.
dataLayer
The events your tags rely on, checked page by page.
Server-side signs
What we can see of your server-side GA4 and Meta setup.
Why Sonar, not another checker
| Check | Sonar | Most free checkers |
|---|---|---|
| Pages checked | Up to 100 | The one page you enter |
| Evidence on every problem | Yes | Varies |
| Selling you a tracking product | No, vendor neutral | Often, server-side hosting |
| Made-up money figures | Never | Some show them |
Validated, not hallucinated.
Sonar only calls something a problem when the crawl proves it. If it couldn't check something, it says so, and that never lowers your score. No AI writes your report, so nothing is made up.
Want an expert to go deeper? See our tracking audit and fix service.
Frequently asked questions
What is a website tracking checker?
A website tracking checker scans a site from the outside and reports what analytics and marketing tags are actually running. Sonar checks GA4, Google Tag Manager, ad platform pixels, dataLayer events and consent setup, then scores your tracking health and only reports problems it can prove from the crawl.
How do I check if Google Analytics is working on my site?
Paste your URL into the scan above. Sonar crawls your site the way a visitor's browser sees it and reports whether GA4 is present and firing, with the evidence attached. Nothing to install, no access to grant.
What does Sonar detect?
Every tag and pixel it finds live on your site: GA4, Google Tag Manager containers, Meta and other ad platform pixels, dataLayer events, and how your consent setup interacts with them. It tells you what's firing, what's broken and what's missing.
Is the scan really free?
Yes. The scan is free and needs no account. An email address only unlocks the full report.
Is it safe to scan my site?
Yes. Sonar works from the outside, exactly the way a visitor's browser sees your site, so there is nothing to install and no account access to grant. Form inputs are never recorded.
How is Sonar different from Google Tag Assistant?
Tag Assistant inspects Google tags in your own browser, on the pages you visit, while you watch. Sonar scans the whole site from the outside, covers non-Google pixels too, and turns the findings into a scored report you can act on or hand to whoever looks after your tracking.
Can I use Sonar as a website tracking audit?
Yes, as the automated first pass of one. Sonar covers the ground a manual tracking audit starts with: what's installed, what's firing, what's broken and what's missing, with evidence for every finding. If the report surfaces problems worth a deeper look, talking to us is the natural next step.
What happens after the scan?
You get the findings, and what you do next is up to you. If the report surfaces problems you want fixed, talking to us is how a Dolphin Analytics engagement starts, and Sonar's findings give that conversation a running start.
Data giving you a headache? We'll take it off your plate.
Tell us what's broken, or grab a time. Either way you hear from a person, not a sales script.
Book a call
Thirty minutes on Google Meet with the founder.
Open the calendar in a new tab
The booking lands on the same record as your message.