Monitor Core Web Vitals inside your analytics dashboard
Alytics measures LCP, INP, CLS, FCP, and TTFB using p75 percentiles — the same methodology Google uses for ranking. No extra tools, no separate dashboards.
No credit card required
| Path | Score | LCP | INP | CLS | Count |
|---|---|---|---|---|---|
| / | 96 | 1.4s | 78ms | 0.02 | 3,241 |
| /pricing | 91 | 2.1s | 105ms | 0.05 | 2,847 |
| /blog/privacy-analytics | 74 | 2.8s | 142ms | 0.12 | 2,344 |
Why Core Web Vitals matter for your website
Core Web Vitals directly influence your Google search rankings and user experience. Sites that fail these thresholds see higher bounce rates, lower conversions, and reduced organic traffic. Monitoring them is no longer optional for any serious website.
LCP (Largest Contentful Paint)
< 2.5s
Measures loading performance. LCP marks when the largest visible element (image, heading, or text block) finishes rendering. A fast LCP reassures users that the page is useful.
INP (Interaction to Next Paint)
< 200ms
Measures interactivity. INP captures the latency of all clicks, taps, and keyboard interactions throughout the page lifecycle, reporting the worst-case response time.
CLS (Cumulative Layout Shift)
< 0.1
Measures visual stability. CLS quantifies how much page content shifts unexpectedly during loading. High CLS frustrates users who click the wrong button or lose their reading position.
FCP (First Contentful Paint)
Measures the time from navigation to when the browser first renders any text, image, or canvas element. FCP gives users the initial signal that the page is loading.
TTFB (Time to First Byte)
Measures server response time. TTFB captures how long the browser waits for the first byte of data from the server. A slow TTFB delays every other metric.
Google uses Core Web Vitals as a ranking signal. Pages that meet all three thresholds (LCP, INP, CLS) are eligible for a ranking boost in search results, making performance monitoring essential for SEO.
Lightweight, accurate measurement built into the tracker
Alytics measures Core Web Vitals using the same browser APIs that Google relies on, with no external dependencies. The implementation adds roughly 1 KB to your tracker script, keeping the total footprint at just 5.8 KB — still far smaller than competing analytics tools.
Custom PerformanceObserver implementation
Uses native browser PerformanceObserver APIs to capture LCP, INP, CLS, FCP, and TTFB without any third-party libraries.
Real User Monitoring (RUM)
Measures performance from actual visitors on real devices and connections — not synthetic lab data from a single location.
Reliable data collection via sendBeacon
Reports metrics using the sendBeacon API, which guarantees delivery even when users navigate away or close the tab.
Per-page context with device metadata
Each metric is collected alongside page URL, device type, and browser information so you can pinpoint exactly where performance issues occur.
Performance dashboard features
The Alytics performance dashboard turns raw Web Vitals data into actionable insights. See your overall score, drill into individual pages, track trends over time, and segment by device — all without leaving your analytics tool.
Performance Score
Overall score from 0-100 based on Core Web Vitals thresholds. See at a glance whether your site meets Google's standards for a good user experience.
Per-Page Breakdown
See which pages need optimization with individual metric scores. Identify your slowest pages and prioritize fixes where they matter most.
Trend Tracking
Monitor improvements over days, weeks, or months. Confirm that your optimizations are working and catch regressions before they impact rankings.
Device & Browser Segmentation
Compare performance across mobile, desktop, Chrome, Safari, and more. Understand how different audiences experience your site and optimize accordingly.
Web Vitals monitoring: Alytics vs other tools
Most analytics tools either ignore Web Vitals entirely or require separate products to track them. Alytics is one of the few platforms that combines real user performance monitoring with your traffic analytics in a single, privacy-first dashboard.
| Feature | Alytics | Google Analytics 4 | PageSpeed Insights | Plausible |
|---|---|---|---|---|
| Real User Monitoring (RUM) | ✓ | Limited | ✗ (lab only) | ✗ |
| LCP tracking | ✓ | ✗ | ✓ | ✗ |
| INP tracking | ✓ | ✗ | ✓ | ✗ |
| CLS tracking | ✓ | ✗ | ✓ | ✗ |
| FCP tracking | ✓ | ✗ | ✓ | ✗ |
| TTFB tracking | ✓ | ✗ | ✓ | ✗ |
| Per-page breakdown | ✓ | ✗ | Single page | ✗ |
| Device segmentation | ✓ | ✗ | ✗ | ✗ |
| Trend tracking | ✓ | ✗ | ✗ | ✗ |
| Built into analytics | ✓ | ✗ | ✗ | ✗ |
| No extra cost | ✓ | N/A | Free | N/A |
| Privacy-first | ✓ | ✗ | ✓ | ✓ |
Core Web Vitals FAQ
What Core Web Vitals does Alytics track?
Alytics tracks all five web performance metrics: LCP, INP, CLS, FCP, and TTFB. All metrics are reported as p75 percentiles.
Does Web Vitals tracking increase the script size?
The Web Vitals measurement code adds approximately 1 KB to the Alytics tracker, bringing the total to 5.8 KB. This is still 8x smaller than Google Analytics.
How are p75 percentiles calculated?
Alytics collects individual metric values from real visitors and calculates the 75th percentile — meaning 75% of your visitors experience this score or better. This matches Google's methodology.
Can I see Web Vitals per page?
Yes. Alytics breaks down all Core Web Vitals metrics by individual page URL, so you can identify which pages need performance optimization.
Start monitoring your Core Web Vitals
Add a single script tag and start tracking real user performance metrics alongside your analytics. No extra tools needed.
No credit card required