Core Web Vitals
Monitor LCP (Largest Contentful Paint), FID/INP (Interaction to Next Paint), and CLS (Cumulative Layout Shift), the metrics Google uses for search ranking.
Web Vitals
How fast is your site, really?
Monitor Core Web Vitals from real users, not synthetic tests. LCP, FID/INP, and CLS with percentile analysis, device breakdowns, and geographic maps.
7-day free trial. Cancel anytime.
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Live Web Vitals demo: real Core Web Vitals data from actual users
Web Vitals
web-vitals
Lighthouse gives you a score. PageSpeed Insights gives you lab data. But neither tells you how your site actually performs for real visitorson real devices, real networks, and real browsers. Rybbit's Web Vitals monitoring measures Core Web Vitals from actual user sessions: the same metrics Google uses to determine your search ranking.
See your LCP, FID/INP, and CLS at the P75, P90, and P99 levels. Break them down by device type, browser, operating system, and geographic region. Spot that your mobile users in Southeast Asia have a 4-second LCP while desktop users in Europe see 1.2 seconds, then fix what's actually slow.
Track performance over time with trend chartsthat make regressions instantly visible. Correlate performance changes with deployments. All data comes from real user monitoring with minimal overhead, and because it's built into Rybbit, there's no extra tool to manage or separate bill to pay.
Capabilities
What you can do
Percentile analysis
View performance at the P75, P90, and P99 levels. Averages hide the slow tail; percentiles show how your slowest users actually experience your site.
Device & browser breakdown
See performance by device type, browser, and operating system. Identify if mobile Safari users have worse LCP than desktop Chrome users.
Geographic performance map
Visualize performance by region on an interactive map. Spot countries or regions where your site is slow due to CDN gaps or server distance.
Time-series trends
Track how your Web Vitals change over time. Correlate performance regressions with deployments or traffic spikes.
Real user monitoring
All metrics come from real users, not synthetic tests. See actual performance as your visitors experience it.
Getting Started
How it works
- 01
Enable Web Vitals tracking
Add trackWebVitals: true to your Rybbit configuration. The tracking code uses the standard web-vitals library to measure CWV metrics.
- 02
Real user data is collected
As visitors browse your site, their actual LCP, FID/INP, and CLS values are measured and sent to Rybbit. No synthetic tests, just real performance from real users.
- 03
View the Performance dashboard
Navigate to Performance in your dashboard. See overview cards, time-series charts, dimension breakdowns, and the geographic performance map.
- 04
Identify and fix issues
Spot which devices, browsers, or regions have poor performance. Use the data to prioritize optimization efforts where they matter most.
Use Cases
Who uses this
Developers & engineers
Monitor performance regressions in production. Correlate deploy times with CWV changes to catch issues before they affect SEO.
SEO teams
Core Web Vitals directly impact search rankings. Track real-user metrics to ensure your site meets Google's performance thresholds.
UX & design teams
Ensure your designs perform well in production. CLS monitoring catches layout shifts that create jarring user experiences.
Platform teams
Set performance budgets and monitor them continuously. Get real user data across all device types and geographies.
Agency developers
Monitor performance across client sites. Show clients real data on how their site performs for actual visitors.
E-commerce teams
Page speed directly impacts conversion rates. Monitor LCP to ensure your product pages load fast enough to keep shoppers engaged.
FAQ
Frequently asked questions
Explore More
Related features
Web AnalyticsThe full analytics dashboard alongside your performance data.Error TrackingCatch JavaScript errors that may cause performance issues.Session ReplayWatch sessions where users experienced poor performance.Custom EventsTrack performance-related custom events and metrics.GoalsCorrelate performance improvements with conversion goals.User JourneysSee if slow pages cause users to abandon their journey.
Know your real performance
Real user Web Vitals monitoring built into your analytics. No synthetic tests, no separate tool.
7-day free trial. Cancel anytime.