Powered by Google PageSpeed Insights v5 · Core Web Vitals + diagnostics
How it works
Core Web Vitals check with a clear fix list.
Paste any URL. The tool runs a PageSpeed Insights analysis on desktop and mobile in parallel - no browser extension or lighthouse setup needed.
See LCP, INP, and CLS scores with pass/needs improvement/fail status for both desktop and mobile, alongside overall performance score.
Each identified issue includes a description of what it is, why it matters, and a specific recommendation. Sort by estimated impact to start with what saves the most points.
Why use it
Core Web Vitals check with a clear fix list.
Raw Lighthouse reports can be hard to interpret if you're not a developer. The PageSpeed Checker translates each audit finding into a clear, actionable description.
CWV scores often differ significantly between desktop and mobile. Both are shown side by side so you can see whether performance issues are device-specific.
Issues are sorted by their estimated performance score impact. You fix the render-blocking resources before you fix the minor image optimisation issues.
Google has published specific thresholds for good/needs improvement/poor for each Core Web Vital. The checker shows you exactly which band you're in for each metric.
Export the results as a report to hand to your developer or agency. No need for them to run their own Lighthouse analysis from scratch.
FAQ
PageSpeed Checker
No account needed for standalone tools. Google OAuth for GSC tools - read-only, no data stored.
Read-only OAuth · no payment · no data reselling