FlawPilot
Performance use case

Measure how fast your website really feels

Get an instant read on Core Web Vitals, page weight, render-blocking assets, and caching posture. No account needed, no limits on free scans.

Analysis complete

Site speed report

For example.com

0Overall
Critical
1
High
1
Medium
5
Low
2
CriticalHomepage unresponsive for 8s on mobile
HighLCP above 4.0s on the homepage
MediumRender-blocking JavaScript on first load
Pages sampled
4
No account needed
Free
Vitals captured
<10s

Core Web Vitals scored against Google's thresholds

Every scan measures LCP, INP, and CLS on a representative set of routes so you can see where real users feel friction. Each metric is graded against Google's pass thresholds, with a clear note on which page element triggered the regression and why.

Vitals report

4
Performance
Critical

Homepage unresponsive for 8s on mobile

Long-tasks block the main thread for over 8 seconds after first paint; real users will tab away.

High

LCP 4.2s on /

Largest contentful paint is well above the 2.5s good threshold; the hero image is the LCP element.

Medium

INP 240ms on /pricing

Interaction to next paint exceeds 200ms; main-thread work blocks input.

Pass

CLS 0.04 on /

Cumulative layout shift is comfortably under 0.1.

Page weight, caching, and asset hygiene

Beyond Web Vitals, FlawPilot inspects the bytes you ship. We flag oversized images, render-blocking scripts, missing compression, weak caching headers, and third-party tags that drag the page down so you can prioritize the cuts that move the needle.

Asset audit

4
Performance
Medium

Total transfer size 3.4 MB

Images account for 2.1 MB; consider WebP or AVIF and responsive srcsets.

Medium

Render-blocking JS detected

Two synchronous scripts in <head> delay first paint by ~600ms.

Low

Missing Cache-Control on /static/*

Long-lived assets should set immutable caching headers.

Pass

Brotli compression active

Text assets are compressed with Brotli, level 5.

Prioritized fixes ranked by score impact

Every finding is paired with the points it would return to your score and a clear next step. You see at a glance whether resizing your hero image will move your grade more than swapping an analytics tag, and the guidance adapts whether you run Next.js, WordPress, or a static build.

Recommended fixes

4
Performance
High

Defer the hero image

Move the hero image off the critical path or use preload with priority hints.

High

Code-split the homepage bundle

Split route-level JS so the first paint does not block on dashboard code.

Medium

Enable HTTP/2 server push for fonts

Push the two woff2 files used above the fold to remove a round trip.

Low

Strip unused CSS on /blog

Roughly 38% of the shipped stylesheet is unused on article pages.

Frequently asked questions

We run a synthetic measurement on a representative set of routes using a controlled environment so results are reproducible. LCP, INP, and CLS are scored against Google's official thresholds. For deeper site-wide measurement we recommend layering in real-user monitoring with CrUX or your own RUM provider.

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Measure how fast your website really feels — FlawPilot