How can I find out which analytics tools a website is using?

Paste the website's URL into the Analytics Detector and run the scan. It inspects the page's public code and lists every detected analytics and tracking platform — such as Google Analytics 4, Meta Pixel, or Hotjar — within seconds.

How does the analytics detector work?

Analytics tools load recognizable scripts and beacons: googletagmanager.com for Tag Manager, matomo.js for Matomo, static.hotjar.com for Hotjar. The detector scans the page source for these signatures.

Can it tell GA4 from Universal Analytics?

Yes. Universal Analytics loads analytics.js with UA- tracking ids, while GA4 uses gtag.js with G- measurement ids or the /g/collect endpoint. The tool distinguishes them and shows the evidence.

Does it detect server-side tracking?

Only partially. Server-side tagging proxies events through the site own domain, hiding third-party script URLs. The tool reports what is visible in the page source.

Why do privacy-focused sites show nothing?

Sites using cookie-less or self-hosted analytics like Plausible or Fathom may load scripts from their own domain, which the tool cannot attribute to a known provider. It reports known signatures only.

Is this useful for competitive research?

Yes. Seeing which analytics and experimentation stack competitors run tells you how seriously they take measurement and optimization, which is valuable market intelligence.

TECHNOLOGY DETECTION TOOLS · FREE ONLINE TOOL

Analytics Detector

See which analytics tools any website usesOpen any website and it is quietly telling someone what you do there. Enter a URL and this checker scans the page source, scripts and network calls, then lists every measurement tool it finds, from Google Analytics 4 to Hotjar and Plausible.

✓ Free to use✓ No sign-up✓ Ready in your browser

// ANALYTICS DETECTOR · GET STARTED

Use Analytics Detector

See which analytics tools any website uses

// ANALYTICS DETECTOR · HOW IT WORKS

How to use the Analytics Detector

Enter URL

Enter the website URL (e.g. example.com).

Scan for trackers

Click "Detect analytics" to scan for tracking scripts.

See the stack

See every analytics tool found with evidence.

// ANALYTICS DETECTOR · ABOUT THIS TOOL

About the Analytics Detector

Almost every website measures its visitors, and those tracking tools are visible in the page source. This detector matches a site's public HTML against signatures for the most common analytics, A/B testing and session-replay tools.

Useful for competitive research and privacy audits, each finding shows its evidence, and the tool distinguishes generations like GA4 versus retired Universal Analytics.

Where it helps most

Four audits where knowing the stack changes the conversation.

Research competitors

Marketers run competitor URLs through it before a pitch to see exactly how sophisticated each rival's measurement setup is.

Audit new clients

Agencies inheriting a new client use it as a first audit step, since duplicate or conflicting tags are a top cause of inflated reports.

Verify your own site

Site owners check their own pages after a redesign to confirm every template fires the right tags, not just the homepage.

Check your privacy

Privacy-minded visitors flip it around and check what watches them on a site before deciding whether to keep browsing there.

Reading the results

What the evidence means, and where it stops.

IDs included

When a GA4 tag is present, the result includes the G-XXXXXXXX measurement ID, confirming exactly which property the page reports to.

Duplicates corrupt data

Duplicate tags double-count pageviews and conversions, while abandoned tags from old platforms add dead weight to every single page load.

Server-side stays hidden

Server-side tracking stays invisible by design: data leaves from the website's own server, so no browser-visible fingerprint exists to find.

Analytics Detector: built for trust

Reads only the public HTML and headers any visitor's browser receives. Never probes for vulnerabilities or anything private.

// ANALYTICS DETECTOR · COMMON QUESTIONS

Analytics Detector FAQs

What analytics tools can this find on a website?

Google Analytics 4, leftover Universal Analytics tags, Google Tag Manager, Meta Pixel, Hotjar, Microsoft Clarity, Mixpanel, Plausible, Fathom, Matomo and similar script-based tools. Anything that loads a tracking script in the page can be spotted.

Can it show the site's Google Analytics measurement ID?

Will it catch analytics added through Google Tag Manager?

Why do leftover or duplicate tags matter?

Can server-side tracking hide from this check?

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