What Is PageSpeed Insights (Mobile)?
PageSpeed Insights (Mobile) is an embedded tool that calls the Google PageSpeed Insights API with mobile strategy only. It shows Lighthouse lab scores and headline metrics for phones. It is not the legacy Google Mobile-Friendly Test product; it is PSI/Lighthouse mobile.
Why Mobile Optimization Matters
Mobile usability and speed affect engagement, conversions, and search visibility. Mobile-first indexing makes a strong mobile lab snapshot useful alongside real-user data.
Who Should Use This Tool?
Webmasters, developers, SEO teams, marketers, and site owners who want a quick mobile Lighthouse summary without leaving the page.
How to Run PageSpeed Insights (Mobile)
Enter a URL and click Run PageSpeed (Mobile). Optionally paste your PageSpeed API key; if empty, the configured default key is used. Runs often take 30-60 seconds. Results are lab data, not field CrUX from this widget alone.
Core Web Vitals and Mobile Speed
The report highlights FCP, LCP, and CLS plus selected audit lines when the API returns them. Newer Lighthouse versions may omit some legacy audits; the on-page note explains that when it happens.
Viewport, Font Size, and Tap Targets
When present in the payload, Lighthouse audit scores reflect viewport, text size, tap targets, and similar mobile UX signals. Missing rows usually mean the audit was not included in the API response, not that your page failed silently.
Layout and Content Width
Older content-width checks may be absent in Lighthouse 12+. The report uses fallbacks and CLS as a stability hint; confirm horizontal scrolling on a real device when unsure.
Full Recommendations and Deeper Audits
For opportunities, filmstrip, and full narratives, open the same URL on the official PageSpeed Insights site. This widget focuses on a compact scorecard.
Best Use Cases
Launches, redesigns, template changes, and periodic mobile spot checks for blogs, stores, and landing pages.
SEO, UX, and Conversions
Consistent mobile performance work supports technical quality and smoother user journeys alongside content and UX improvements.
Changelogs
v1.0.0 (May 2026): Initial release(alert-success)