RabbitLoader is a CDN cache-based speed optimization plugin that uses caching, CDN, and other techniques to reduce the loading time of WordPress websites. Enabling you to get a perfect score on Google PageSpeed Insights and achieve better SEO rankings.

You would not need 10 different plugins for caching, CDN, HTML, JavaScript, CSS minification, lazy loading of images and videos, image size reduction, WebP conversion, preloading, compression, and so on.

All these optimization plugins overwhelm the admin panel, conflict with each other, and slow down your website. Just install RabbitLoader, and it will optimize the whole website in a few minutes without the need for an expert or a developer.


  • Obtain a PageSpeed Score of 95 or higher for all pages.
  • Reduce image size by 40% with the NextGen WebP format.
  • Reduce CSS size by 98% automatically.
  • Improve Core Web Vitals (lower FCP, FID, and CLS).
  • Higher rankings on Google Search and better conversions.
  • No coding knowledge is needed.
  • Replaces 5–10 optimization plugins.
  • Cache, Lazy Loading, CDN, Compression, Preloading, LQIP.
  • Image, CSS, JavaScript Optimization.

Benefits of using RabbitLoader:


Caching is the process of storing frequently accessed data or assets in a temporary storage space for faster access and retrieval. RabbitLoader does this automatically, and one doesn’t need to use any separate plugin for caching when using RabbitLoader.

It stores the website’s assets in the cache memory, which means that the browser does not have to fetch them again from the server, resulting in faster page loads and a better user experience.

CSS and JavaScript Cache

All CSS and JavaScript files are cached at CDN servers for a lifetime. This is also referred to as immutable caching because the cached content does not change unless the file version in the URL changes or a full purge is performed.

RabbitLoader improves CSS and JavaScript caching by utilizing browser caching headers. When a browser requests a resource from a server, it can store that resource in its cache, as long as the server provides caching headers that specify how long the resource should be cached.

Overall, RabbitLoader does a better job of caching CSS and JavaScript by leveraging browser caching headers and other techniques. These techniques can significantly improve the performance of a website and enhance the user experience by reducing page load times.

Image Caching

Similar to CSS and JavaScript files, images are cached at CDN servers for a lifetime, also known as immutable caching. The cached content never changes unless the file version in the URL changes.

When a user visits a webpage for the first time, their browser downloads all the necessary assets, including images, from the server. The browser stores these images in a cache so that it can access them quickly if the user visits the same webpage again.

RabbitLoader improves image caching by utilizing the browser caching headers, similar to CSS and JavaScript caching. It sets optimal caching headers to ensure that the images are cached for the appropriate amount of time, reducing the number of times the browser has to request them from the server.

RabbitLoader does all this automatically, improving the performance of a website by reducing the load time of images, resulting in a better user experience.

Browser Cache

Browser caching is a technique used to store static assets like HTML pages, CSS and JavaScript files, and images in the user’s browser cache , allowing the browser to access them quickly if the user visits the same website again.

RabbitLoader automatically ensures that the assets are cached for the right amount of time. This reduces the number of requests the browser makes to the server, reducing the load on the server and improving the overall performance of the website.

Image Optimization

Image optimization is the process of reducing the size of an image without compromising its quality. By optimizing images, website owners can reduce the load times of their pages, resulting in a better user experience.

RabbitLoader does this automatically through lossless image conversion to WebP format, by reducing image size by 40% to 50% on average. It uses various different techniques to optimize images, like lazy loading, compression, etc. These techniques can significantly improve the performance of a website by reducing the load time of images, resulting in a better user experience.

Lazy Loading Images

Lazy loading is a technique that loads web content only when it’s needed. Instead of loading all images on a webpage at once, lazy loading loads images as they come into view. This technique significantly reduces the time it takes for a web page to load by prioritizing the elements that the user can see immediately.

RabbitLoader does this by lazy loading images, along with YouTube and Vimeo videos, Google Maps, and any iframe embedded content. Only below-the-fold images are lazy loaded after all critical resources have finished loading, which keeps your LCP (largest element above the fold) and CLS scores healthy.

NextGen WebP Format

The Next-gen WebP format is an image format that uses advanced compression techniques to reduce the size of images while maintaining their quality. WebP images are up to 30% smaller than JPEG or PNG images, resulting in faster page load times.

RabbitLoader improves the use of next-gen WebP format by automatically converting images to the WebP format. RabbitLoader detects the user’s browser and serves the WebP version of the image if the browser supports it. If the browser does not support the WebP format, RabbitLoader serves the original image format. This ensures that the user always receives the best version of the image that their browser supports.

Image Placeholders

When images are loaded on a website, they can cause a delay in page loading time, resulting in a poor user experience. To address this issue, many websites use lazy loading techniques that delay the loading of non-critical images until they are needed. This can significantly improve the page loading time, but it can also result in a visual lag or “layout reflow” as images load in.

To minimize this issue, RabbitLoader uses LQIP (Low-Quality Image Placeholder) or blurred image placeholders to give the visitors a better experience while waiting for the full-quality image to load.

By using image placeholders, RabbitLoader ensures that the website’s layout remains intact and does not shift around when images are loaded, leading to a smoother user experience. Additionally, RabbitLoader uses caching to further improve the loading speed of these images, reducing the time required for images to be loaded when a user navigates to a new page or returns to a previously viewed page.

This helps to minimize the visual lag and ensures that visitors have a consistently fast and responsive experience, no matter where they are in the world or what device they are using.

Integrated CDN

Integrated CDN is an important feature that RabbitLoader offers, which allows for caching of website content at multiple servers located around the world. RabbitLoader CDN service is integrated with the plugin, and no additional CDN plugin or service is required.

This feature reduces the loading time of a website by serving content from the server nearest to the user, which in turn reduces bounce rates and improves the user experience.

With an integrated CDN, RabbitLoader caches the website assets at multiple locations around the world, ensuring that the content is delivered to the user from the closest server. This reduces the latency and response time, resulting in faster website loading times.

This is especially important for websites with a global audience, as it ensures that visitors from all over the world can access the website quickly and without any delay.

300+ PoP’s

RabbitLoader uses a Content Delivery Network (CDN) that is distributed throughout the world with over 300 Points of Presence (PoP). This means that no matter where your visitors are located, they can access your website’s content in milliseconds, resulting in a faster and smoother experience.

This is essential for websites with a global audience, as it ensures that users from all regions can access your website quickly without experiencing any delays. With a distributed network, RabbitLoader is able to provide a faster response time for website content, which can improve user engagement and reduce bounce rates. The CDN’s wide coverage ensures that the content can be delivered to users from the nearest server, resulting in lower latency and faster loading times.

Moreover, the use of a global CDN can also improve website security by distributing website traffic across multiple servers, reducing the risk of website crashes and distributed denial of service (DDoS) attacks.

Overall, RabbitLoader’s use of a distributed network with over 300 PoPs offers significant advantages over traditional CDN services and can greatly enhance the performance of your website.

Low Data Transfer Time

Low data transfer time refers to the amount of data being transferred between a server and a client during a particular transaction. This could refer to the transfer of any type of data, such as text, images, videos, or other files. A low data transfer means that the amount of data being transferred is minimal, which can result in faster loading times and a better user experience for visitors accessing a website or web application.

Low data transfer time is an important aspect of website performance, especially for users with slow internet connections. RabbitLoader uses the latest content compression algorithm from Cache Memory to minimize data transfer time for visitors on slow networks.

This ensures that visitors can access website content quickly and efficiently, without having to wait for long load times or experience laggy page performance. By reducing data transfer time, RabbitLoader enhances website speed and improves the overall user experience, leading to increased engagement and reduced bounce rates.

This feature is particularly useful for websites that receive a lot of traffic from users on slow or unreliable networks, as it helps to ensure that these visitors can still access the website quickly and easily.

Zero Down Time

Zero Down Time refers to the ability of a website to remain accessible to visitors even when the origin server is down. This is a crucial feature for any website that wants to ensure uninterrupted access to its content, products, or services.

RabbitLoader CDN provides Zero Down Time functionality to its users. If the origin server goes down, RabbitLoader’s CDN cache steps in to serve the website’s content to visitors. This means that visitors will still be able to access the website’s content, even if the origin server is offline.

This is a crucial feature for businesses and organizations that rely on their website to generate revenue, as even a short period of downtime can lead to lost sales and revenue. With RabbitLoader, website owners can rest assured that their website will remain accessible to visitors, no matter what happens to the origin server.

CSS Optimization

CSS optimization is the process of reducing the file size of CSS files, improving page load speed, and ultimately, the user experience. This is important because CSS is responsible for styling web pages and can become quite large and complex, leading to slower page load times.

RabbitLoader takes care of CSS optimization for both critical and non-critical CSS using CDN cache. By leveraging caching technology, RabbitLoader can significantly reduce the load times of CSS files. Additionally, RabbitLoader optimizes both critical and non-critical CSS files, ensuring that the critical CSS is loaded first for a better user experience.

Optimizing CSS files is an important aspect of improving website performance, and RabbitLoader helps achieve this by automating the process and ensuring that CSS files are cached and optimized for fast loading times.

Critical CSS Rendering

Critical CSS rendering is a technique that involves separating the critical CSS code from the non-critical CSS code and loading it first.

This is done to ensure that the website loads quickly and the user can see the above-the-fold content without any delay. Above-the-fold content is the content that a user sees on the screen without having to scroll down.

When a website is loading, the browser has to parse and render all the CSS files before the content can be displayed. This process can be time-consuming, especially if the CSS files are large.

By rendering only the critical CSS, the browser can load the content much faster and improve the overall user experience.
RabbitLoader is designed to optimize critical CSS rendering by automatically detecting and optimizing the critical CSS code. It uses advanced algorithms to identify the critical CSS code and load it first.

This technique helps to minimize render blocking, parsing, and cache misses, which can slow down the website’s loading speed.

Defer non-critical CSS

Defer non-critical CSS is a technique used to improve website loading speed and the overall user experience. As the name suggests, it involves deferring the loading of non-critical CSS until the critical resources have been loaded.

This helps to minimize render blocking, reduce the amount of time it takes for a page to become interactive, and improve the perceived loading speed of the website.

With RabbitLoader, this process is automated and optimized. The non-critical CSS is separated and deferred to allow the critical resources to load first, and the loading of the non-critical CSS is triggered after the critical resources have been loaded.

This ensures that the website’s critical content is loaded as quickly as possible, and the non-critical content is loaded in the background without impacting the website’s performance. By optimizing this process, RabbitLoader helps to improve website speed, reduce bounce rates, and enhance user experience.

Deferring JavaScript

Deferring JavaScript refers to delaying the loading of non-critical JavaScript files until after critical resources, such as HTML, CSS, and images, have finished loading. This technique can significantly improve website performance by reducing page load times and enhancing the user experience.

RabbitLoader effectively defers non-critical JavaScript files, especially those from third-party plugins and services, such as pop-ups, analytics, social media buttons, ads, chat widgets, and embedded media.

By doing so, RabbitLoader prioritizes critical resources, allowing them to render faster, which enhances the user experience.

With RabbitLoader, website owners can expect improved website performance, reduced page load times, and better user engagement. By deferring non-critical JavaScript, RabbitLoader ensures that the website loads faster, which leads to better engagement, higher search engine rankings, and improved conversion rates.

Minify HTML, CSS, and JavaScripts

Minification of HTML, CSS, and JavaScript codes involves removing unnecessary characters such as white spaces, comments, and line breaks.

This makes the code smaller and faster to download, resulting in a quicker page load time. By minifying the code, the visitor’s browser can read and render it faster, resulting in a better user experience.

RabbitLoader offers minification of HTML, CSS, and JavaScript codes as a feature, ensuring that the code served to the visitor is smaller and faster to download. This helps to reduce the load time and boost the page speed score.

The RabbitLoader cache serves the minified version of the codes to the visitor, which is quicker to download and render, resulting in an overall faster page load time.

Core Web Vitals

Core Web Vitals are a set of performance metrics used to measure the user experience of a website. These metrics were introduced by Google in 2020 and include three specific factors: loading, interactivity, and visual stability. The loading factor measures how quickly the main content of a page loads, the interactivity factor measures how quickly users can interact with the page, and the visual stability factor measures how stable the visual elements of a page are while it loads.

Having a good Core Web Vitals score is essential for providing a better user experience, and it can also lead to better rankings in Google Search. When a website has good Core Web Vitals, it can lead to higher engagement, longer time on site, and more conversions.

RabbitLoader helps to improve Core Web Vitals by optimizing various aspects of a website, including image loading, CSS, and JavaScript optimization, and deferring non-critical resources.

By improving these aspects, RabbitLoader can help to reduce page load times, improve interactivity, and prevent visual instability. As a result, websites that use RabbitLoader are more likely to have good Core Web Vitals scores and better overall user experiences.

FID (First Input Delay)

FID is a Core Web Vitals metric that measures the time between a user’s first interaction with a page and the browser’s response to that interaction. This metric is essential because it provides insight into how quickly a page responds to user input, which can significantly impact the user experience.

An ideal page should have an FID below 100 milliseconds. Slow FID can lead to frustration for users and impact engagement metrics, such as bounce rates and time on page. Therefore, it’s essential to optimize FID for a better user experience.

RabbitLoader is useful in decreasing the FID duration by minimizing the primary thread’s workload. When the primary thread is not overloaded with heavy scripts and resources, the browser can respond to user inputs in as little as 50 milliseconds.

By deferring non-critical scripts and resources, RabbitLoader ensures that the critical resources load first and reduce the primary thread’s workload. As a result, the page responds quickly to user input, leading to a better user experience and improved engagement metrics.

LCP (Largest Contentful Paint):

LCP is an important Core Web Vital metric that measures the loading speed of the largest content element on a web page. Google recommends a good LCP score of less than 2.5 seconds.

A high LCP score can lead to a poor user experience and negatively impact the page’s search engine ranking.

RabbitLoader’s CDN Cache can significantly improve the LCP score of a website by delivering content quickly to visitors, regardless of their location. By utilizing caching and compression technologies, RabbitLoader minimizes the time it takes for a website to load the largest content element, ensuring that it appears quickly on the user’s screen.

This reduces the risk of visitors bouncing due to slow loading speeds and improves the website’s overall performance in search engine rankings. With RabbitLoader, website owners can ensure that their website’s LCP score is consistently less than the recommended threshold of 2.5 seconds, leading to better user experience and increased traffic.

CLS (Cumulative Layout Shift)

CLS is a metric used to evaluate the visual stability of a web page. It measures the sum total of all layout shifts that occur during the page load, including any unexpected shifts that might occur after the page has loaded.

Any sudden changes can adversely impact the user’s experience, making CLS an essential metric for evaluating the user experience.

While it largely relies on how website developers insert dynamic content or advertisements through JavaScript, RabbitLoader attempts to allocate the necessary space for elements that will be loaded at later stages of a page’s timeline.

By doing this, it minimizes the layout shift and ensures that the visual content remains stable during the page load.
With RabbitLoader’s optimization techniques, CLS is minimized, ensuring that visitors get the best user experience possible.
This metric is important not only for user experience but also for search engine optimization since Google has indicated that it will be a ranking factor in the future.

Track Every URL

“Track Every URL” is a feature provided by RabbitLoader that enables users to track the PageSpeed score for every URL on their website.

By tracking the PageSpeed score, users can quickly identify the pages that need additional improvements and take the necessary steps to optimize those pages. This feature helps users maintain the overall performance of their website and ensures a better user experience.

By regularly monitoring the PageSpeed score for every URL, users can make informed decisions about optimizing their website and ensuring that it meets the Core Web Vitals metrics. RabbitLoader’s “Track Every URL” feature provides users with an easy-to-use tool to keep their website’s performance on track and optimize it for a better user experience and higher search engine rankings.

This is very useful when you have hundreds and thousands of pages, and checking all of them one by one manually could be virtually impossible.

  • Static content, including CSS, font files, images, and JavaScript, is served via our CDN servers.
  • Advanced resource loading mechanism to get the best Chrome UX and PageSpeed score.
  • Optimize web font loading and rendering. Web font loading requires caching. Cache helps users from downloading the fonts repeatedly every time they visit your site.
  • Lazy loading of ads (AdSense, AdThrive, etc. It loads data into cache when it is a necessity.
  • Option to exclude pages from caching and full control through page rules. If you want to remove any particular page from cache.
  • Woo-Commerce compatibility with multi-currency plugins. The cache has to be manually excluded from Woo-Commerce.

All the CPU intensive optimizations are performed by RabbitLoader cloud servers, thus reducing the usage of your hosting resources and your hosting bandwidth usage.

This feature makes it possible for you to have a super-fast website without the need for a VPS server.

Just use any shared hosting environment or even a low end hosting configuration and still achieve a perfect PageSpeed Insights score.


  • Core features of RabbitLoader
  • Home tab of the plugin showing Lighthouse score for your pages based on Google PageSpeed.
  • RabbitLoader account overview page shows best and average Google PageSpeed score for all your pages, cached data usage etc.
  • Usage pattern and hits per day for cached and non-cached resources.
  • Connect your WordPress website with RabbitLoader account with one click.


I am using WooCommerce, will RabbitLoader work?

Yes, RabbitLoader works well for all content categories be it e-commerce, blog, or a fully dynamic page.

Can I set page-rules for different sections of my website?

Yes, if you want to customize the behavior, you can choose the correct content-type while creating page rules.

I am using Shared Hosting, will RabbitLoader work?

Yes, RabbitLoader works well for shared, dedicated or VPS hosting irrespective of the hosting type and company except your local environment. Additional details available here if you want to try the plugin on pre-production or staging environments.

How does this plugin work?

RabbitLoader makes sure that your Google PageSpeed Insights score is always 100 out of 100.
We improve FCP by removing render-blocking CSS and JS, reduce server response times, keep request counts low by deferring off screen payloads such as non-visible images.
RabbitLoader can help reducing the FID time by reducing the main thread work and allowing the browser to respond to user actions typically within 50 milliseconds.
We ensure the LCP element and styles needed are loaded as soon as possible and Render-blocking JS/CSS are deferred so LCP can render typically within 2.5 seconds.
Images are converted from JPEG/PNG to Next-Gen WebP format.
We try to minify and compress all possible assets to the best extent possible.

Even after installing RabbitLoader plugin, my Google PageSpeed score is low. Why?

After installing and activating RabbitLoader plugin, you need to connect it with our cloud service by clicking on “Connect with RabbitLoader” button on the ‘Settings’ tab of the plugin.

Once connected, it may take a few hours to optimize all pages of your website. The status are shown on the ‘Home’ tab of the RabbitLoader plugin page URL performance tab too.

If you are running ads program on your website, they can heavily impact the performance. Check how to defer loading AdSense/AdThrive or other ad networks.

Do I need a specific hardware configuration for my server?

No. The plugin works equally efficient irrespective of the hardware size. All the heavy lifting optimization task is carried out outside your origin, adding no overhead to your CPU/RAM.

Can I use it with other performance plugin?

You can use other plugins along with RabbitLoader if their functionalities are not overlapping. Make sure you turn off those features which conflict.

My hosting service uses Varnish cache? Can I use RabbitLoader with it?

Yes, RabbitLoader is 100% compatible with Varnish cache and works great with it without any additional settings.


August 26, 2023 1 reply
I gotta give a shoutout to Rabbitloader, they seriously rock! Not only the plugin do more than it promose (all my pages are now A on GTMetrix!!) but their support team is on another level of amazingness. I hit them up with a bunch of questions and they were super quick to respond and help me out. They really know their stuff and went the extra mile to make sure I was taken care of. I gotta say, it’s rare to find such a friendly and helpful support team these days. Rabbitloader, you’ve got my thumbs up! Keep up the awesome work! 🙌🐇
August 24, 2023 1 reply
About a week ago, I had a problem with a web page that was really slow. I contacted the support team, and they responded in less than 24 hours. From then on, the support team started to investigate the issue. In two days, I had it fixed. The issue was that a plugin called “Replace Google Fonts with Bunny Fonts” is incompatible with RabbitLoader. Thanks for your support and quick response.
August 6, 2023 1 reply
I purchased the RabbitLoader product through AppSumo in Sept 2022. The purchase process and activation were flawless thanks to AppSumo. The product worked well enough, even though the UI and the process to add domains was clunky and not very intuitive. The help sections were hard to use and not very informative. A serious problem emerged from an entirely unlikely reason. The email that I used to purchase the product was being discontinued so I needed to change it. RabbitLoader refused to change the email. They insisted that AppSumo re-issue an invoice with the changed email. There's nothing automated about that process. Even AppSumo support went above and beyond to try and work with RabbitLoader, but they were absolutely stubborn on this point. So I offer a cautionary tale that your investment in this product could be LOST in the event you have to do something as simple, and widely supported by nearly every SaaS product, as to change the email on your account.
July 26, 2023 1 reply
This plugin is super easy to use - you won't believe how straightforward it is! And if you ever have any questions or concerns, the support team is always there to help you. The plugin has all the necessary features to speed up your website without hassle. You'll be amazed at how quickly your site will load!
July 18, 2023 1 reply
I used RabbitLoader WordPress Plugin to optimize my website, and it delivered impressive results. With easy installation and setup, it significantly improved loading speed and performance. The plugin boosted my PageSpeed score, reduced image size by 40%, and minimized CSS files by 98%. It enhanced Core Web Vitals, resulting in better Google rankings and conversions. RabbitLoader replaced multiple optimization plugins effortlessly with features like caching, lazy loading, CDN integration, compression, LQIP, image/CSS/JavaScript optimization. Its integrated CDN with 300+ Points of Presence ensured fast content delivery worldwide. The support from the team was excellent. Overall, I highly recommend RabbitLoader for website optimization.
Read all 43 reviews

Contributors & Developers

“RabbitLoader” is open source software. The following people have contributed to this plugin.


“RabbitLoader” has been translated into 2 locales. Thank you to the translators for their contributions.

Translate “RabbitLoader” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



  • Enhancements related to refreshing stale cache


  • Bugfix for WooCommerce products sorting dropdown change
  • Cache conflict when plugin is in Me mode
  • Support for latest WordPress version ‘6.3.1’


  • Enhancement related content compression when transferring data

2.19.5, 2.19.6

  • Bugfix related to content change detection and cleaning up of stale cache


  • Compatibility improvements with WPML (WordPress Multilingual) and AMP plugins
  • Enhancements for Divi and other Elegant Themes


  • Fix for broken Single page purge feature
  • Compatibility improvements with JetPack menu
  • Plan usage analytics graph


  • Compatibility improvements for PHP versions older than v7.2


  • Improved cache hit ratio
  • Compatibility fixes for IF-SO plugin
  • Improved page detection for websites built with Elementor


  • Bugfix related to critical CSS not shown correctly in some cases


  • Bugfix related to cleaning up of stale cache


  • Better handling of expired cache and invalidation


  • Compatibility with Hide My WP plugin


  • Faster cache cleaning on purge or content changes
  • Compatibility improvements for PHP versions older than v7.2
  • Compatibility with Ajax Search Pro plugin


  • Support for Module type JavaScript Script tags
  • Stability fix of intermittent white screen issues


  • CDN coverage and performance improvements


  • Security and performance improvements


  • Compatibility improvement with other plugins


  • Private mode for testing and debugging


  • Control settings to discard cache


  • More insights on CSS optimization


  • More insights on image optimization


  • Feature to ignore URL parameters


  • Detail reports around CDN bandwidth usage and assets requests served


  • Added URL performance report to easily identify good and bad performing URLs for site owners.


  • Log messages to get more insights on things running under the hood, compatibility enhancements with LightSpeed server


  • Enhancements in detecting new post and post status changes


  • Added purge button on the post preview page


  • Option to exclude URLs from optimization and caching


  • Use of WordPress advance cache for faster response of cached data


  • Automatic handling of optimization and caching
  • Auto-Purge on website wide activities like theme change, etc


  • First release of the plugin