What happens to the URL.

A submitted URL is sent to this app so a headless browser can open that public page. The audit reads the rendered page and takes screenshots. It does not submit forms, log in, or click through the site.

Finished reports are kept in memory for a few minutes so the same URL is not audited again immediately. They are not written to a database. There is no account.

Field performance data is requested from Chrome UX Report only when a server API key is configured. Otherwise it is skipped. An optional language model is used only when its server environment variables are set, and it is not given measurements to invent.