Website performance has become crucial in determining any online platform’s success and user experience. One recommendation you might come across while using PageSpeed Insights to analyze your website’s speed is to preload key requests.

Preloading key requests on WordPress is a powerful technique to enhance website speed and responsiveness. This article will guide you through preloading essential resources, such as CSS, JavaScript, and fonts, and how to optimize your WordPress site’s performance.

Understanding Preloading

What is preloading? Preloading is a smart way to speed up your website. It allows browsers to store and retrieve important resources automatically before you ask for them, making websites load much more quickly when you ask for them, making the user experience smoother and snappier.

WordPress websites include stylesheets, scripts, fonts, and many assets to function properly. Preloading these materials reduces the time it takes for your website to load, making it more responsive and user-friendly.

Why Preload Key Requests on WordPress?

To state the obvious, no one loves a slow website, so preloading key requests on your WordPress site offers several benefits:

  • Improved Page Load Times

By preloading critical resources, you can significantly reduce the time it takes for your pages to load, resulting in a faster and more responsive website.

  • Enhanced User Experience:

Faster page load times translate to a better user experience, as visitors are less likely to experience frustrating delays or lag when navigating your site.

  • Increased Engagement

When your website loads quickly, visitors are more likely to engage with your content, explore more pages, and spend more time on your site, which can positively impact your SEO and conversion rates.

  • Compliance with Performance Metrics

Many web performance metrics, such as Google’s Core Web Vitals, strongly emphasize page load times and resource optimization. Preloading key requests can help you meet or exceed these performance standards.

Preloading Key Requests on WordPress

To preload important requests on your WordPress site, follow the steps below:

Identify Key Requests: Determine which critical resources should be preloaded on your WordPress site. These normally include CSS, JavaScript, and font files, all required for your pages’ initial rendering and operation.

To preload CSS: add the following code snippet to the section of your WordPress theme’s functions.php file, or use a plugin like Autoptimize or WP Rocket

// preload css only on page about
function wpb_hook_javascript() {
	if (current_user_can( 'update_core' )) {
        } else {
            // Check for the page you want to target
    if ( is_page('about') ) {
        <link rel="preload" href="style.css" as="style">
add_action('wp_head', 'wpb_hook_javascript', 99);

Preload JavaScript: The code will look like this for preloading a JavaScript file:

<link rel="preload" href="" as="script">

Replace with the actual URL of your JavaScript file.

Preload Fonts: Preloading fonts can significantly improve the initial rendering of your website, especially if you’re using custom or web-based fonts. Use the code below to preload fonts:

<link rel="preload" href="" as="font" type="font/woff2" crossorigin>

Replace with the actual URL of your font file.

Preload Google Fonts: If you’re using Google Fonts on your WordPress site, you can preload the font files like this:

<link rel="preload" href="" as="style" crossorigin>

Preload Font Awesome: For Font Awesome icons, use the following code:

<link rel="preload" href="" as="font" crossorigin>

Replace with the actual URL of your Font Awesome font file.

Preload Images (Optional): While preloading images is not as common as preloading CSS, JavaScript, and fonts, you can also preload some photos on your WordPress site using the code below:

<link rel="preload" href="" as="image">

Replace with the actual URL of your image file.

Implement Preloading Using WordPress Plugins

If you would rather have a professional all-in-one solution than create custom code, you can use dedicated WordPress plugins that handle the implementation. Some popular options include:

Pre* Party Resource Hints

The Pre* Party Resource Hints plugin provides preload, prefetch, and preconnect directives.

The Pre* Party Resource Hints plugin provides a user-friendly interface to manage preload, prefetch, and preconnect directives. Furthermore, the plugin plugin improves website speed by preloading critical resources.

It also enhances user experience by ensuring faster page loading and smoother navigation, making it a valuable tool for WordPress site optimization.

WP Rocket

WP Rocket is a premium caching plugin with an extensive feature set.

WP Rocket is a popular caching plugin that includes a preload key requests feature that can be configured from the plugin’s settings under the preload fonts area.  You may add links to the fonts you want to preload with WP Rocket or choose to preload fonts.

To find out what fonts to preload in WP Rocket, put your website address into PageSpeed Insights to do a website performance test, and it will recommend these files as well (if necessary).


Use a minification plugin like Autoptimize.

In addition to optimizing your CSS and JavaScript, Autoptimize offers a preload key requests option. The plugin optimizes website performance and options to defer script execution and optimize images, resulting in faster loading times and improved user experience for visitors.


The Perfmatters plugin includes preload, preconnect, and prefetch options.

The Perfmatters premium plugin includes preload, preconnect, and prefetch options in its settings.

Furthermore, the plugin optimizes website performance by allowing users to disable unnecessary scripts, reduce HTTP requests, and implement other speed-enhancing features for faster loading times.

If you use any of these plugins, you can easily identify and preload the critical resources on your WordPress site without having to manually modify your theme’s code.

Best Practices for Preloading Key Requests on WordPress

To ensure the optimal performance and effectiveness of your preloaded key requests, consider the following best practices:

  • Prioritize Critical Resources

Carefully examining your website’s resource loading patterns, prioritize the most important assets for preloading, such as above-the-fold CSS and JavaScript. 

  • Avoid Over-Preloading

While preloading might be useful, too many preloaded resources can have the reverse effect and slow down your site’s initial load time. Maintain a balance and only preload the most important assets. 

  • Test and Measure

Regularly test your website’s speed before and after adopting preloading, to ensure the changes are effective. Tools like Google PageSpeed Insights, GTmetrix, and WebPageTest can provide useful insights into your site’s speed. 

  • Keep Resources Up-to-Date

Periodically review and update the preloaded resources to ensure that they match the latest versions of your CSS, JavaScript, and fonts. This will help maintain optimal performance as your site evolves.

  • Utilize Browser Caching

To further improve the speed of your website, use browser caching and preloading. This ensures that frequently used materials are cached locally, which reduces the need for multiple downloads. 

  • Monitor Server Load

Keep an eye on your server’s performance and ensure that the increased preloading requests do not overload your infrastructure. Adjust the preloading configuration if necessary to balance performance and server stability.

Integrating Preloaded Key Requests with WordPress Management Services

To ensure the ongoing optimization and maintenance of your WordPress site’s performance, consider partnering with a reputable WordPress management service like WPDepend. These services can provide comprehensive support for your WordPress site, including:

White-Label WordPress Maintenance and Support

WPDepend offers White-Label WordPress maintenance and support services, allowing you to outsource the day-to-day management of your site to experienced professionals.

WordPress Care Plans

These packages provide several services to keep your website up-to-date and performing at peak efficiency. These services include security monitoring, performance optimization, and frequent upgrades. Contact WPDepend for a complete WordPress care plan.

WordPress Management Services

You can make sure that your site’s performance stays a major priority even if your company and website change over time by integrating preloaded critical requests with an all-inclusive WordPress management solution.

WPDepend’s team of WordPress experts can handle a wide range of tasks, from content updates and plugin management to SEO optimization and website migrations. 


Preloading key requests is a powerful technique to improve the performance of your WordPress site.

By proactively loading critical resources, such as CSS, JavaScript, and fonts, you can significantly enhance your website’s load times, user experience, and compliance with web performance standards.

Whether you choose to implement the preloading process manually or utilize dedicated WordPress plugins, the benefits of preloading key requests are clear.

By following the best practices outlined in this article and partnering with a reliable WordPress management service like WPDepend, you can take your WordPress site’s performance to new heights and provide visitors with a seamless and engaging experience.

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About the Author

WP Webify

WP Webify

Editorial Staff at WP Webify is a team of WordPress experts led by Peter Nilsson. Peter Nilsson is the founder of WP Webify. He is a big fan of WordPress and loves to write about WordPress.

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