Should you still be concerned about native lazy loading for SEO?

What exactly is native lazy loading?

Native lazy loading is a feature introduced in Chrome that defers the loading of images located outside the initial viewport. Technically, all that's needed is to add the loading='lazy' attribute to an tag for the browser to automatically manage deferred loading.

Unlike JavaScript solutions that require third-party scripts, this approach relies on a native browser API. The browser decides when to load the image based on user scrolling and various distance thresholds. There's no need for libraries like lazysizes or tinkering with Intersection Observer.

Why does this declaration from Google make a difference?

Historically, JavaScript lazy loading has been a source of recurring indexing issues. Many implementations prevented Googlebot from discovering images, as the bot didn’t scroll or execute JavaScript correctly in all contexts.

With Googlebot Chromium natively supporting the loading='lazy' attribute, this friction disappears. The bot recognizes the attribute and triggers image loading just like a modern browser would. This is a significant evolution for sites that have adopted this method.

What are the limits of this compatibility?

The support of the loading='lazy' attribute by Googlebot doesn’t mean that all images will be systematically crawled. If an image is too far down the page or if the crawl budget is tight, it might never be discovered.

Moreover, some hybrid implementations mix native lazy loading and JavaScript. In such cases, JS execution errors can still block access to images. Native lazy loading works well, but only if you don’t add extra layers that disrupt the mechanism.

• Googlebot Chromium supports the loading='lazy' attribute without special configuration
• This approach avoids typical errors associated with third-party JavaScript solutions
• The crawl budget and page depth remain limiting factors
• Hybrid implementations (native + JS) can still pose problems
• The loading='lazy' attribute is a recommended solution for images below the fold

Is this declaration consistent with field observations?

In practice, tests indeed show that images with loading='lazy' appear in Google Images and in Search Console reports. Crawls of sites using this method confirm that Googlebot loads deferred resources.

However, it’s important to nuance this: compatibility works best for images located in the first scroll sections. For infinite galleries or deeply nested images, there are still gaps. Google’s statement is true, but it doesn’t solve every scenario.

What nuances should be added to this statement?

First point: native lazy loading does not equate to prioritization of indexing. Googlebot can load the image, but if it is deemed irrelevant or redundant, it will not necessarily be indexed in Google Images. Technical support does not guarantee visibility.

Second point: some CMS or frameworks automatically add JavaScript on top of the native attribute, creating implementation conflicts. For example, WordPress has been adding loading='lazy' by default since version 5.5, but some themes override this functionality with their own scripts. [To verify]: the actual impact of these duplicates on crawling remains unclear in official statements.

In what cases is this method still insufficient?

For e-commerce sites with hundreds of products per page, native lazy loading may not suffice. If Googlebot only crawls the first 20 visible products, images of subsequent products may be ignored, even with loading='lazy'.

Similarly, for content generating images dynamically via JavaScript (like React or Vue.js), the native attribute has no effect if the DOM is not yet built at the time of crawling. In such situations, a server-side rendering (SSR) or pre-rendering approach remains essential.

What concrete actions should you take on your site?

First step: audit your images to identify those that are below the fold (out of the initial viewport). These are ideal candidates for the loading='lazy' attribute. Never apply it to hero images or above-the-fold content, as that would degrade the Core Web Vitals, particularly LCP.

Second step: check that your CMS or framework doesn’t add redundant JavaScript layers over the native attribute. Inspect the source code and test the behavior in a modern browser. If you are using WordPress, ensure that your theme does not override the default lazy loading.

What mistakes should you absolutely avoid?

Never place loading='lazy' on images critical for visual SEO or for the initial user experience. Google may penalize sites that artificially delay the loading of important content. Images of key products, logos, and article visuals must be loaded immediately.

Avoid also mixing multiple lazy loading solutions. If you’re using the native attribute, disable third-party lazy loading JavaScript scripts. This technical redundancy creates conflicts and can paradoxically block crawling or degrade performance.

How to check that the implementation is correct?

Use Google Search Console to analyze the coverage of indexed images. Compare the number of images present on your pages with those detected by Google. A significant gap may signal a crawling issue related to lazy loading.

Also test with a tool like Screaming Frog in JavaScript enabled mode. Check that images with loading='lazy' indeed appear in the crawl. If they are absent, it’s a warning signal. These technical optimizations can quickly become complex, especially on high-volume sites or those with advanced JavaScript architectures. For personalized support and risk-free implementation, consulting a specialized SEO agency can help avoid costly mistakes and maximize visibility impact.

• Apply loading='lazy' only to images below the fold
• Never lazy-load hero images or above-the-fold content
• Disable JavaScript lazy loading scripts if the native attribute is used
• Regularly audit image coverage in Search Console
• Test crawling with Screaming Frog in JavaScript enabled mode
• Verify that lazy-loaded images appear in Google Images