Why does CrUX say no data for my client site?
PageSpeed Insights finishes the Lighthouse half of the report and then leaves the “real users” block empty. The client Slack thread fills with “is CrUX broken?” and someone refreshes the same URL three times. Lab scores are there, but field percentiles are not. That pattern is usually eligibility, not a failed API call. What follows is the engineer’s short path: which kind of “no data” you are…
The Chrome UX Report (CrUX) displays no data for your client site because the necessary eligible Chrome sessions are not available for that origin or URL. Lighthouse scores are present, but field percentiles are missing. This pattern usually indicates eligibility issues, not a failed API call. To resolve this, ensure the URL and host match exactly as CrUX expects.
CrUX only publishes anonymized field distributions when enough eligible Chrome sessions clear privacy and quality rules for the site. The absence of field data does not indicate a slow site; lab diagnostics can guide performance improvements while eligible traffic builds.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
