How to tell if a website uses Google Analytics 4

In short

To tell if a website uses Google Analytics 4, scan it with the free detector below. Look for the gtag.js loader with a G- measurement id, or googletagmanager.com/gtag. Google Analytics 4 is a analytics tool: Google Analytics 4 is the most common web analytics tool. It reports traffic, events, and conversions for free.

Detect Google Analytics 4 on any website

Scan website

Try:shopify.comhubspot.comnotion.so

Sample result

brightsmile-dental.com

8 technologies across 7 categories · scanned May 20, 2026

Copy summary Share with client Report card

CMS 1

WordPress

Analytics 1

Google Analytics 4

Tag managers 1

Google Tag Manager

Frameworks 1

PHP

JavaScript 1

jQuery

CDN 1

Cloudflare

Hosting 2

Google CloudNginx

Gaps and opportunities

Every gap is a service you could sell this business every month. Ranges below are typical agency pricing, not guarantees.

No CRM detectedThis business is probably losing leads in inboxes and notebooks.

A CRM that captures every lead in one place$300 to $800/mo

You build it once in GoHighLevel.

No chat or AI widgetNo way to capture or answer leads after hours.

An AI chat or voice agent that replies and books 24/7$500 to $1,500/mo

Built in GoHighLevel.

No review or reputation toolNo system asking happy customers for Google reviews.

Review automation that runs on autopilot$200 to $500/mo

Set up once in GoHighLevel.

No ad or conversion pixelThey are running ads blind, or not running ads at all.

Ad setup with proper tracking, plus management$500 to $2,000/mo

GoHighLevel tracks it end to end.

No email marketing platformNo follow-up, so leads go cold after the first visit.

Email and SMS follow-up that nurtures every lead$300 to $1,000/mo

Built in GoHighLevel.

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What is Google Analytics 4?

Google Analytics 4 is the most common web analytics tool. It reports traffic, events, and conversions for free.

In the tech stack detector, Google Analytics 4 shows up in the Analytics group. Knowing a site runs Google Analytics 4 tells you how it is built and what it is set up to do.

How to detect Google Analytics 4

Look for the gtag.js loader with a G- measurement id, or googletagmanager.com/gtag.

You do not have to dig through page source by hand. Paste the website into the detector above and it reports Google Analytics 4 along with the CMS, analytics, pixels, hosting, payments, chat, email, and CRM the site uses.

Why it matters for agencies

Knowing a prospect runs Google Analytics 4 (or does not) shapes your pitch. The detector also flags the gaps: if a site has no CRM, no chat widget, no review tool, or no ad pixel, that is a clear opening for a GoHighLevel CRM, an AI chat or voice agent, review automation, or a paid ads setup.