Free Page Size Analyzer

Page weight directly impacts load speed, especially on mobile. This tool measures your total page size and breaks it down by resource type (HTML, CSS, JavaScript, images, fonts) — showing you exactly where bloat is coming from and whether gzip or brotli compression is enabled.

scheduleSpeed tests typically take 15–30 seconds.

What This Tool Checks

check_circleTotal page weight in KB/MB with performance benchmark
check_circleResource breakdown by type: HTML, CSS, JavaScript, images, fonts, other
check_circleTransfer size vs uncompressed size (shows compression effectiveness)
check_circleNumber of HTTP requests by resource type
check_circleLargest individual resources identified
check_circleUnused CSS and JavaScript bytes estimate

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Why This Matters for SEO

Page weight is a direct cause of slow load times, especially on mobile networks. A 5MB page on a 4G connection takes 4–8 seconds to transfer, before the browser has even started parsing it. Large JavaScript bundles are particularly harmful — they block the main thread, hurting INP and TTI. Reducing page weight is often the highest-ROI performance improvement available.

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Frequently Asked Questions

What is a good page size for web performance?expand_more

Google recommends keeping total page weight under 500KB for optimal performance. The average web page is now over 2MB, which contributes to slow load times especially on mobile. For the initial page load, aim for under 200KB of HTML and critical CSS/JS. Images are typically the largest resource — compress them with WebP and use responsive images. Total JavaScript should ideally be under 300KB uncompressed.

How does page size affect SEO?expand_more

Page size indirectly affects SEO through its impact on Core Web Vitals and load speed. Large pages have slower LCP (the largest image takes longer to download), worse INP (large JS bundles delay interactivity), and poor TTFB if server responses are large. Since Core Web Vitals are a Google ranking factor, reducing page weight can improve your rankings alongside user experience.

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Track page weight changes after every deploy

PerfBee monitors page size trends over time — so a 2MB JavaScript bundle added by a new feature never slips past unnoticed. Get daily crawl reports, broken link alerts, Core Web Vitals tracking, and AI fix suggestions — across your entire site.