Image Lazy Load Checker
Scan a page for image lazy-loading, missing alt text, and missing width/height (CLS risk).
About This Tool
The Image Lazy Load Checker helps you verify whether images on your website are loading lazily (only when they enter the user’s viewport). Lazy loading improves page speed and reduces initial page load time.
It’s perfect for website owners, developers, SEO professionals, bloggers, and agencies who want to optimize website performance and Core Web Vitals.
With this tool, you can:
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Detect lazy loading implementation
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Check for
loading="lazy"attribute -
Identify deferred image loading
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Improve page speed performance
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Reduce bandwidth usage
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Optimize user experience
How It Works
1️⃣ Enter Website URL
Paste the URL of the page you want to analyze.
2️⃣ Scan Page Images
The tool checks image tags and loading behavior.
3️⃣ Analyze Lazy Load Method
It looks for:
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loading="lazy"attribute -
JavaScript-based lazy loading
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Deferred image scripts
4️⃣ View Results
You’ll see:
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✅ Lazy loading enabled
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❌ Lazy loading not detected
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Number of images optimized
Still Have Questions?
Lazy loading delays loading of images until they are about to appear on the user’s screen.
Yes. Faster loading improves user experience and can positively impact search rankings.
You can enable it via:
Native HTML attribute
loading="lazy"Performance plugins
JavaScript libraries
CDN optimization
Yes. Modern WordPress versions support native lazy loading by default.