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Editorial deep-dives on the state of web performance
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Common questions about BeaverCheck scores and checks
How we calculate scores across 100+ checks
The story behind BeaverCheck and the team
Practical guides to fix common web performance issues
Step-by-step guides for moving between web technologies
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Check WCAG color contrast ratios between any two colors
Inspect HTTP response headers for any URL
Analyze SSL/TLS certificate details and chain
Look up DNS records for any domain
Trace the full redirect chain for any URL
Real-user INP and Core Web Vitals from Google's Chrome UX Report.
RESTful API for programmatic website audits
Embed an auto-updating health score badge on your site
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
403 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.72 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
566 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.097
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.89 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
4.79 s
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Main Thread Breakdown
Showing top 10 of 11 scripts
Downloaded but never executed on this page.
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
~674.0 KiB of savings available
no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Web fonts
1
39 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
This site is hosted on green energy infrastructure
Provider: Cloudflare
Microsoft Clarity takes 739ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Unattributable takes 628ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Google Tag Manager takes 470ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Google Tag Manager takes 211ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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22.3 s