Lazy Loading Checker Online — Free Image Optimization Test

Scan any webpage to see which images are missing alt text. Improve accessibility and SEO by identifying images without descriptive alt attributes.

Calculate the total download size of any webpage including all resources. Analyze page weight for performance optimization — free and instant.

Calculate the percentage of visible text versus HTML code on any webpage. A higher ratio often indicates better content quality for SEO.

Check if images on a webpage use native lazy loading. Identify which images will defer loading until they enter the viewport.

Find domain ownership details, registrar information, creation and expiration dates, and nameservers. Fast, free WHOIS search for any domain.

Preview how your webpage will look when shared on Facebook, LinkedIn, X (Twitter), and other social platforms. Debug OG and Twitter Card tags.

Check if a webpage is blocked from search engine indexing via meta robots tags, X-Robots-Tag headers, or robots.txt directives.

Verify if a website has HTTP Strict Transport Security (HSTS) properly configured. Ensure visitors always connect securely over HTTPS.

Simulate how your webpage appears in Yandex search results. Perfect for optimizing meta data for Russian and Eastern European audiences.