HomeWordPressHow To Preload Largest Contentful Paint Image In WordPress

How To Preload Largest Contentful Paint Image In WordPress


In the modern age of digital content consumption, website performance is essential for ensuring user satisfaction and engagement. One critical aspect of website performance is the largest contentful paint (LCP) image, the most prominent visual element on a webpage. In this article, we will explore how to preload largest contentful paint image in WordPress to optimize your website’s performance and user experience. We will cover plugins and practices to help achieve this goal.

1. Understanding the Largest Contentful Paint Image

Largest contentful paint (LCP) is a performance metric that measures the time it takes for the most significant visual element on a webpage to load. This element is often an image but can also be a video or text block. The Largest Contentul Paint image can be a key factor in determining your website’s page load speed and user experience.

Google considers LCP an essential aspect of website performance and includes it as a Core Web Vital.

Largest Contentful Paint LCP Metric
LCP Score

Websites with a fast LCP score with a load time lower than 2.5 seconds are more likely to rank higher in search results, leading to increased organic traffic and better user engagement.

2. The Importance of Preloading LCP Images

Preloading the largest contentful paint image is a technique used to ensure that the browser downloads the LCP image early in the page-loading process, even before the main rendering occurs. This practice helps to reduce the time it takes for the LCP image to become available.

By preloading the LCP image, you can overcome potential delays caused by the browser’s default prioritization of other resources, such as JavaScript files or other images in the viewport. This proactive approach to loading the LCP image can lead to better Lighthouse and Real User monitoring (RUM) scores, which are important for search engine optimization (SEO) and overall website performance.

3. Ways to Preload Largest Contentful Paint Image

There are several methods for preloading the largest contentful paint image in WordPress, ranging from plugins to manual code implementation.

First, you will need to identify the LCP element. Run a Lighthouse audit and check the largest contentful paint element.

Key Point: You must make sure that the LCP element is an image

3.1 Popular Plugins for Preloading LCP Images

Several WordPress plugins can help you preload the largest contentful paint image. These plugins offer various features and support for different themes and frameworks. Some recommended plugins include:

  1. Perfmatters: This plugin allows you to set the number of critical images that are usually above the fold, automatically preloading and excluding them from lazy loading. For example, above-the-fold images can be your website logo, author image, or the featured image for the post, which totals 3 images. You can set the number of images to 3, and the plugin will exclude the first 3 images from lazyload and preloads them.
  2. FlyingPress: FlyingPress identifies above-the-fold images, stops lazy load for them, and instead preloads these images
  3. Preload Featured Images: This plugin automatically preloads featured images but is only compatible with specific themes. See the plugin homepage for the full list of compatible themes.
Preload Largest Contentful Paint Image - perfrmatters
Preload Largest Contentful Paint Image – perfrmatters

3.2 Preloading LCP Images Manually

You can preload the LCP image manually by adding the appropriate code to the head of your webpage. You can use the Header and footer plugin, and add the following code to the header. Replace the image filename with the one you want to preload.

<link rel="preload"

It may not be practical to use this code on every page specifying individual images, especially on, say, the WordPress post page. There are ways to add a code snippet to identify the featured image of a post and preload it. I would recommend using a plugin, ideally an optimization plugin like Perfmatters or FlyingPress, which provides this option out of the box.

4. Testing the Impact of Preloading LCP Images

After implementing LCP image preloading, you can measure the impact on your website’s performance using various tools, such as GTmetrix. Open the waterfall chart to see how preloading LCP images have affected the loading sequence and overall performance.

5. Optimizing LCP Images for Various Devices

To further improve your website’s performance, consider optimizing all elements and factors which can impact the Largest Contentful Paint score. Your website infrastructure, code optimization, and compression can make a big difference to your LCP score. So make sure you take an all-round approach to optimization.

6. Conclusion

Preloading the largest contentful paint image in WordPress is an essential practice for optimizing your website’s performance and user experience. By implementing this technique using plugins or manual code, you can improve your website’s Lighthouse and RUM scores, leading to better search engine rankings and increased user engagement.

Remember to exclude above-the-fold images from lazy loading and optimize LCP images for various devices to ensure the best possible performance for your website’s visitors.

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Shashi Venkatesh
Shashi Venkatesh
Shashi Venkatesh is a 22-year veteran of the technology industry, with experience developing and managing large-scale web applications for clients, working globally across America, Europe, and Asia. He is also a Wordpress aficionado and has consulted extensively in the development of Wordpress websites, blogs and ecommerce platforms. He enjoys reading and gaming and is an avid motorsport fan.


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