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A report that makes sense.

Illustrative sample only. No audit was run, and all example metrics are demonstration data.

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This clearly labelled sample is excluded from production data and analytics. The resource URLs and savings below are illustrative.
Sample reportMobile

Your performance snapshot

Lighthouse lab data

Illustrative sample: a moderate lab score with opportunities to reduce JavaScript work and image bytes. These numbers are demonstration data, not measurements of example.com.

Performance
Accessibility
Best practices
SEO
Automated SEO and accessibility scores are not complete professional assessments. Lab results vary by run and do not prove a Core Web Vitals field assessment.

What the lab measured

One URL · mobile
3.1 s

When the largest visible element renders in the lab test.

1.4 s

When the first text or image appears.

180 ms

Lab main-thread blocking. This is not real-user INP.

0.04

How much visible content unexpectedly moves.

2.8 s

How quickly the visible page fills in.

Real-user field data

Unavailable

The provider did not supply URL-level field data. The page may not have enough eligible real-user samples. Lab measurements remain useful diagnostics, but cannot establish a Core Web Vitals field pass.

Your prioritized findings

3 shown
1

Reduce unused JavaScript

High

Downloading and parsing unused code adds network and CPU work.

Your next step: Use browser coverage tools to identify unused modules. Split bundles by route and load optional features when needed.

Illustrative opportunity
Effort: Medium — estimateProvider-estimated savings: 138.7 KiB
Affected resources (1 shown)
url: https://example.com/assets/app.js
wastedBytes: 142000
2

Properly size images

Medium

Oversized images download pixels the visitor does not see.

Your next step: Generate image variants and add srcset and sizes to match the rendered layout.

Illustrative opportunity
Effort: Low — estimateProvider-estimated savings: 93.8 KiB
3

Keep text visible during font loading

Medium

Visitors should not wait for a font download before they can read content.

Your next step: Use font-display: swap or optional and reduce font variants.

Illustrative opportunity
Effort: Low — estimate

Your action checklist

Follow the measured priorities. Effort and savings are estimates, not guaranteed improvements. Checkbox selections are temporary.

Compare your progress

No earlier compatible audit is available. Run the same URL and device again after changes. A matching Lighthouse version is required for comparison.