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Free PageSpeed test

Page speed, audited by Lighthouse

Run a free PageSpeed test on any URL: Performance, Accessibility, Best Practices, SEO and Core Web Vitals, powered by Google Lighthouse.

Free, no account. Audits take 20–40 seconds; results stay for 7 days. Retest after 5 minutes.

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Sample report

Scores, vitals and a fix list

Every audit returns four scores, the three Core Web Vitals and a ranked list of opportunities with the time you'd save by fixing each one.

seonio / pagespeedExample data
example.comMobile
76
Performance Needs work
94
Accessibility Good
92
Best practices Good
100
SEO Good

Core Web Vitals · field data where available

LCP Good

2.1 s

Largest Contentful Paint

INP Good

180 ms

Interaction to Next Paint

CLS Good

0.05

Cumulative Layout Shift

Top opportunities · ranked by potential savings

  • Eliminate render-blocking resources

    Inline critical CSS and defer non-critical JS so the first paint isn't blocked.

    −1.2 s

  • Properly size images

    Serve images at the size they display at; today many are 2–4× too large.

    −0.8 s

  • Reduce unused JavaScript

    Code-split and tree-shake: 184 KB of the main bundle is unused on this route.

    −0.4 s

Real reports show every opportunity Lighthouse finds, with the exact resources and bytes involved.

Core Web Vitals

The three metrics behind page experience

Core Web Vitals are part of Google's page-experience signals. Every PageSpeed test grades your page against the same thresholds Google uses.

LCP

Largest Contentful Paint

How quickly the largest visible element (hero image, headline) renders. The user's "is this page loading?" moment.

Good
≤ 2.5 s
Needs work
≤ 4.0 s
Poor
> 4.0 s

INP

Interaction to Next Paint

How quickly the page responds when a user taps, clicks or types. Replaces the older First Input Delay (FID).

Good
≤ 200 ms
Needs work
≤ 500 ms
Poor
> 500 ms

CLS

Cumulative Layout Shift

How much the page jumps around as it loads: images without dimensions, late banners, web fonts.

Good
≤ 0.10
Needs work
≤ 0.25
Poor
> 0.25

Thresholds source: web.dev/vitals (opens in a new tab). The report also shows secondary lab metrics (FCP, TBT, Speed Index, TTFB) for context.

Four Lighthouse categories on every audit

PerformanceLCP, INP, CLS plus the lab metrics (FCP, TBT, Speed Index, TTFB) that explain why a page is slow
AccessibilityContrast, labels, focus order, ARIA usage and the keyboard navigation issues that block real users
Best practicesHTTPS, console errors, deprecated APIs, vulnerable libraries and modern-platform compatibility
SEOCrawlability, meta tags, mobile-friendliness, structured data and the on-page basics search engines check
How it works

Real Lighthouse data in under a minute

We call the PageSpeed Insights API, so Google runs the same Lighthouse engine PSI uses.

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