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Official statement

Google recognizes lazy loading images even when they use data-src instead of src, as long as the final render properly displays the image element. To ensure indexing, it's recommended to use structured image data or an image sitemap.
🎥 Source video

Extracted from a Google Search Central video

💬 EN 📅 23/10/2021 ✂ 24 statements
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✂ Other statements from this video 23 ▾
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  2. □ Why doesn't the visual quality of images impact traditional SEO?
  3. □ Do App Store reviews really impact your web SEO?
  4. □ How does Google determine your daily crawl rate and what does it mean for your SEO?
  5. □ Are 5XX errors really more damaging than 404 errors for SEO?
  6. □ Why doesn’t the crawl rate bounce back instantly after a technical fix?
  7. □ How does Google actually identify soft 404s?
  8. □ How does Google leverage URL parameters to determine the canonical version?
  9. □ Does scraping really distort impressions in Search Console?
  10. □ How do internal links truly influence your SEO strategy?
  11. □ Why are Technical SEO and Quality Content Inextricably Linked?
  12. □ How long does it really take for Core Web Vitals to impact your rankings?
  13. □ Should you rely on a single trust score for SEO?
  14. □ Does deferred JavaScript really have no impact on SEO?
  15. □ Should You Keep URLs Indexable for Temporarily Out of Stock Products?
  16. □ How Does a Link from the Homepage Speed Up Reindexing?
  17. □ Do JavaScript vulnerabilities flagged by Lighthouse really affect your SEO?
  18. □ Does the importance of the author change depending on the type of content?
  19. □ Is using nofollow on internal links really unnecessary for PageRank?
  20. □ Is Content Really the Only Factor in Site Classification?
  21. □ Is Infinite Scrolling Changing Our SEO Strategy for Good?
  22. □ Should you really aim for a server response time under 200 ms for SEO?
  23. □ What causes your FAQ rich results to vanish after a redesign?
📅
Official statement from (4 years ago)
TL;DR

Google recognizes lazy loading images using data-src, provided the final render displays the image element correctly. To ensure indexing, add structured image data or use an image sitemap.

❓ Frequently Asked Questions

Pourquoi utiliser data-src pour le lazy loading ?
Data-src réduit le chargement initial des pages en différant le rendu des images non visibles. Cela optimise la performance utilisateur.
Comment s'assurer que mes images sont bien indexées ?
Utilisez un sitemap d'images, des données structurées, et testez le rendu réel de vos pages pour garantir leur visibilité.
Les données structurées sont-elles obligatoires pour indexer des images en lazy loading ?
Non, mais elles facilitent grandement la compréhension par Google des éléments visuels de votre site.
🏷 Related Topics
Domain Age & History Crawl & Indexing Images & Videos Web Performance Local Search Search Console

🎥 From the same video 23

Other SEO insights extracted from this same Google Search Central video · published on 23/10/2021

🎥 Watch the full video on YouTube →

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