Referrer checker
Is this visit from an AI assistant?
Paste a referrer, a landing URL or both. The check runs in your browser against the open referrer list; nothing is sent.
Last checked · How we check
On this page
Leave empty if the visit had none.
Optional. Read for utm_source only.
What the checker does
It compares the hostname of a referrer, and the utm_source of a landing URL, with the referrer list. The result names the assistant if there is a match, shows the evidence behind that row, and lists how GA4, Plausible, Matomo and PostHog describe the assistant.
It handles the awkward cases: an empty referrer (this is how Direct looks), a tag with no referrer, an origin without a path, input without a scheme, an app identifier and a Google referrer, which cannot be told apart from ordinary search.
How to get the two values
- Open the page of your own site that an assistant linked to. In the browser's developer tools console, type
document.referrerand copy the result. Empty means no referrer was passed. - Copy the full address from the address bar. The query string is where utm_source lives.
- Paste both values above. Your analytics tool shows the same two things as source, medium and landing page.
What it cannot tell you
- How your own analytics property classified the visit. "Named" only means the tool's documentation mentions the assistant.
- Whether a hostname that is not on the list belongs to an assistant. The list grows with evidence; it has a check date for a reason.
- Where a Direct visit came from. Without a referrer and a tag there is nothing to read. See why AI clicks end up as Direct.
Follow-up questions
A visit shows google.com. Was it AI?
It cannot be told. AI Overviews and AI Mode clicks are counted as google / organic, the same as classic results. See the Google row of the list.
What does tag only mean?
The landing URL has a utm_source that names an assistant, but no referrer arrived. Tools that classify by referrer alone leave such a visit in Direct; tools that read utm_source count it. The UTM explainer has the background.
Can I remove the tag from the link?
Yes, with the UTM cleaner.