Enhanced measurement
Which automatic events are on: page views, scrolls, outbound clicks, site search, video and file downloads.
Google Analytics 4
See inside any GA4 setup.
Enter a Measurement ID or any website. We read the published Google tag and lay out every event, key event and privacy setting.
About the GA4 Checker
Audit any Google Analytics 4 setup from a URL
GA4's configuration is not a secret: the Google tag (gtag.js) every visitor downloads carries the property's settings. The GA4 checker finds the Measurement ID behind a site and decodes that tag into a readable audit, so you can verify a setup without access to the property.
Key events
Events marked as key events (conversions) and the created and modified event rules behind them.
Consent & privacy
Consent mode defaults, Google signals, ads personalisation and data collection settings.
Traffic rules
Cross-domain domains, internal traffic rules, unwanted referrals, session timeout and data redaction.
How it works
- 01
Enter a site or a G- ID
Type any website, or a GA4 Measurement ID like G-XXXXXXXXXX or a Google tag ID (GT-).
- 02
We find and read the tag
TagSpy locates the Google tags on the page and downloads the published gtag.js for each.
- 03
Read the audit
Events, key events, consent and settings, each explained in plain language.
Questions
How do I find a website's GA4 Measurement ID?
Enter the website in the GA4 checker. TagSpy scans the page and its tag manager container for G- and GT- IDs and lists every Google tag it finds, then opens the one you choose.
Can I see another website's GA4 events?
You can see the events configured in its Google tag: enhanced measurement, created events, modified events and key events. Events sent only from custom code or the server are not visible in the tag.
How do I check if GA4 is installed correctly?
Run your own site through the checker. If no Google tag is found, GA4 isn't loading; if it is, the report shows which events and consent settings are live.
Does the GA4 checker need access to my Analytics account?
No. It reads the public Google tag every visitor downloads. Nothing is installed, no login is needed, and nothing you check is stored.