Mobile-Friendly Tester
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Preview any website at iPhone, Android, iPad, and desktop sizes. Check your responsive design instantly.
Page Size & Load Time
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Measure a web page's HTML size, response time, resource counts, and third-party host list.
Page Size & Load Time
Fetches HTML via CORS proxy. Times include proxy round-trip — use for relative comparison, not absolute benchmarks.
Page Analysis
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HTML Size
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Fetch Time
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Images
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Scripts
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Stylesheets
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Links
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3rd-Party Hosts
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Words
About This Tool
What This Measures
- HTML payload size (compressed vs raw)
- Wall-clock fetch time via proxy
- Image, script, stylesheet, and link counts
- Number of unique third-party domains
- Visible word count
Note: measures HTML only, not full page load. For complete audits use Lighthouse or WebPageTest.
Frequently Asked Questions
Why is load time different from Google PageSpeed?
PageSpeed measures full browser load (HTML + CSS + images + JS execution). This tool fetches only HTML via proxy. Use for quick relative comparisons only.
What HTML size is acceptable?
Under 100 KB is excellent. 100-300 KB is typical for content-rich pages. Over 500 KB often means inline base64 images or redundant styles u2014 worth investigating.
Why do third-party hosts matter?
Each external domain requires DNS + TLS + connection setup before loading. Sites with 50+ third-party domains feel sluggish even on fast connections.