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Ultimate Guide to WordPress Image Optimisation Techniques

WordPress image optimisation is an essential aspect of maintaining a fast-loading and visually appealing website. By selecting the correct strategies, you can guarantee that your images are enhanced for both speed and user experience. 

What Is WordPress Image Optimization?

WordPress image optimization refers to the process of reducing the file sizes of images used on a website without compromising their visual quality. The aim is to compress images in such a way that they take up less space on your WordPress site, while still appearing just as good as before. There are several techniques and tools available for optimizing images on a WordPress site. By using smaller file sizes, you can add more images to your website without causing it to slow down or become sluggish. 

Optimizing all the images on your WordPress site should be one of your top priorities when it comes to improving its overall performance. Image optimization can significantly reduce page load times, which will attract more visitors and keep them engaged with your content. Ultimately, no matter how great your content is, users won’t stick around if they have to wait too long for pages and images to load. Therefore, image optimization plays a crucial role in enhancing user experience and driving traffic towards your website.

Why Should I Optimize Images in WordPress?

There are four main reasons you should optimize images in WordPress.

  • Speed up page load times
  • Improve SEO 
  • Reduce server loads
  • Reduce overall website size 
  • Stay on top of important WordPress maintenance tasks

Factors That Affect WordPress Page Load Speeds

If you’re looking to improve the loading speed of your WordPress site, it can be overwhelming to know where to begin. However, one key area that you should focus on is optimizing your images. By the end of this article, you’ll have a comprehensive understanding of how to do so. But keep in mind that image optimization is just one piece of the puzzle when it comes to optimizing your WordPress site for faster load times. To achieve optimal speed, you need to consider all factors that affect website performance. To ensure lightning-fast loading speeds for your site, make sure you take into account all aspects such as:

1. Use Lightweight Images

To make use of lightweight images, it is necessary to optimize them. The aim is to compress the images as much as possible without compromising their quality. This technique is known as lossless compression and can be achieved by utilizing an image optimizer tool.

2. Optimize Your Website Caching

A WordPress caching plugin is designed to enhance the loading speed of your website by minimizing the data transfer between your site visitor’s browser, your WordPress database, and your web server. It maintains a cache of your site that can be cleared manually or automatically as needed.

3. Use a Quality WordPress Host

If you’re serious about your WordPress website, you won’t settle for a cheap hosting plan that costs only $4 per month. Such plans may be suitable for individuals who run personal blogs with low resource usage and traffic, but they are insufficient for site owners who experience high loads and require faster page loading times. To ensure optimal performance, invest time in finding a reputable managed hosting provider with data centers located in various regions. Additionally, compare server response times when selecting a host as this can significantly impact the speed at which your site loads for visitors.

4. Optimize Code

Enhancing the loading speed of your website is crucial, and one way to achieve this is by optimizing the code that powers it. This process involves refining and improving the code on your WordPress site, making it more efficient and faster in execution. By streamlining your code, you can significantly reduce page load times and provide a better user experience for visitors to your website.

  • Using quality plugins and themes
  • Keeping your themes and plugins updated to the latest version
  • Not using plugins that overlap in functionality or features
  • Uninstalling/deleting any unused plugins or themes.

Developers need to minify code by:

  • Removing formatting and comments
  • Getting rid of extra spaces
  • Removing commas and code that’s not being used

It’s important to minify the code in all of your resources, including HTML, JavaScript and CSS. For minifying your HTML, a powerful tool is HTMLMinifier. For JavaScript, give UglifyJS a try. The Closure Compiler is also worth looking into. When it comes to your CSS, CSSNano is a good choice.

5. Cut Down on Redirects

To avoid 404 errors, it is sometimes necessary to set up redirects. However, it’s best to steer clear of using multiple-use redirects whenever possible. This type of redirect involves sending users from one page to another and then onto a third page. With each additional redirect, the target page takes longer to load – potentially exceeding the three-second threshold for optimal site speed. While a single redirect won’t cause significant delays in loading times, multiple redirects can be detrimental. As such, it’s best practice to limit your use of redirects as much as possible. Optimizing your WordPress images is also crucial for improving site speed. Whether you’re managing one website or several client sites, optimizing images should be an essential part of your process.

Does WordPress Automatically Compress Images?

WordPress 5.3 has improved support for high-resolution images, which include pictures taken with a high-quality camera or smartphone. The new image compression feature can detect large images and generate web-optimized versions of them automatically upon upload. WordPress resizes the uploaded images to 2560 pixels, which is the new full size in WordPress, and adds the word “scaled” to the name of your file if it’s resized. If an automatic resize fails due to server timeout issues, WordPress will keep trying until it optimizes the image successfully. This update was significant for developers who may not have been aware that their large image files were slowing down their websites. However, relying solely on WordPress’ built-in image optimization isn’t enough as it doesn’t cater to each developer’s specific needs. While this is a good starting point for optimizing your website’s images, you need additional measures to maximize your site’s performance fully.

How Do I Optimize Images in WordPress?

Fully optimizing your images within WordPress isn’t too tricky of an endeavor.

There are three main ways to optimize images for your WordPress website:

  • WordPress image optimization plugins that allow you to do the work directly from your WordPress admin dashboard.
  • Pre-upload image optimizer software/application – These applications may take the form of open-source software, such as an image optimizer or, at the very least, a picture editor, or they may take the form of commercial apps that can alter image size. Photoshop is an example of a premium software tool that can modify picture resolution to compress photos for use on the internet.
  • Free online services that compress and optimize your images before uploading them to WordPress.

Using A Pre-Upload Image Optimizer

An image optimizer is a software program that helps to compress images by making slight changes to the pixels. This process, also known as lossless compression, cannot be detected by the naked eye. You can access an image optimizer either online via your web browser or by installing it on your personal device. Similar techniques are used when compressing audio files into MP3s, where high frequencies are strategically reduced in a way that goes undetected by the ear.

Pre-Upload Image Optimization Tool Options

You have quite a few options for tools that will compress and optimize your images before you upload them to WordPress.

1. A Desktop Photo Editor

If you are accustomed to using Photoshop, then there is no need for you to compress your images further. This is because you have the option of exporting your newly created images in any resolution that suits your needs. The same rule applies to most other photo editing software available on desktops. However, if you are not already utilizing Photoshop as a means of creating images for your website, it’s unlikely that you will take the time and effort required to learn such a complex program solely for the purpose of image compression. Nonetheless, desktop photo editors like Photoshop can serve as an independent solution when it comes to compressing and optimizing images.

2. Mobile Apps and Online Photo Editors

There are various photo editing apps and online photo editors such as Fotor and Pixlr that can be utilized for basic photo editing purposes. These tools also provide features to enhance your images before uploading them on WordPress. However, using these solutions might seem excessive, similar to using Photoshop. Moreover, some of these tools may require payment for their services, and you may not need most of the additional features they offer.

3. Web-Based Image Compressors

For those who wish to enhance their images before uploading them to WordPress, specialized online software is likely the optimal solution. To find a suitable option, simply search for “online image compressor” and select the free tool that appeals most to you. The majority of these services operate in much the same way. Once you have chosen your preferred tool, all that remains is to upload your image and choose the compression level you desire. Furthermore, many web-based tools offer bulk optimization capabilities which are particularly useful if you need to optimize numerous files at once.

Explore Popular Image Compression Plugins

  • Smush: Smush is a widely-used WordPress plugin that offers lossless compression of images without compromising quality. It also provides additional features such as lazy loading and resizing options, making it an all-in-one solution for your image optimization needs.
  • EWWW Image Optimizer: Another powerful plugin option, EWWW Image Optimizer automatically compresses images upon upload and can even bulk-optimize existing media files on your site. With support for various formats including JPEG, PNG, GIF, and WebP, this plugin caters to diverse requirements.

Configure Plugin Settings for Optimal Results

For maximum efficiency, it is essential to adjust the settings of these plugins in line with your particular requirements. Here are some tips on achieving optimal results:

  • Determine the appropriate level of compression: While higher levels may result in smaller file sizes, they could also lead to reduced image quality; finding the right balance between size reduction and visual appeal is crucial.
  • Select suitable formats: Some plugins, like EWWW Image Optimizer, support multiple formats. Choose the ones that best suit your website’s requirements to ensure compatibility and optimal performance.
  • Enable additional features: Many image optimization plugins offer extra functionalities such as lazy loading or resizing options; activating these can further enhance your site’s speed and user experience.

By selecting the right plugin and configuring its settings appropriately, you can significantly improve your WordPress site’s load times while maintaining high-quality visuals for an engaging user experience.

Compressing images with plugins is an essential step in optimizing your website for faster loading times and better SEO. Adding alt text to images further enhances the optimization of your website by providing relevant keywords that search engines can crawl.

Add Alt Text to Images

Adding alt text (alternative text) to your images not only improves accessibility but also boosts SEO performance by providing search engines with more context about your content. Ensure you add descriptive alt text when uploading graphics or transparent background images in WordPress.

Importance of Adding Relevant Keywords in Alt Text

Incorporating relevant keywords into the alt text of your images is crucial for improving their visibility on search engine results pages (SERPs). This practice helps search engines understand what the image represents and index it accordingly, thereby increasing its chances of ranking higher. Additionally, using appropriate keywords ensures that users who rely on screen readers can access and comprehend the information conveyed through visuals.

Frequently asked question

To optimize images on your WordPress site, follow these steps:

  1. Select the appropriate image format (JPEG, PNG, GIF).
  2. Compress your images using a plugin such as Smush or EWWW Image Optimizer.
  3. Add relevant alt text to improve accessibility and SEO.
  4. Create visually appealing thumbnails and optimized favicons.
  5. Maintain an organized media library by deleting unused files in bulk.

Optimize your WordPress site’s images for SEO by following these best practices:

  • Add descriptive alt text with relevant keywords to help search engines understand the content of the image.
  • Select suitable file formats based on quality requirements and compression capabilities.
  • Name files descriptively while including target keywords.
  • Avoid overloading pages with excessive imagery; instead use CSS sprites when possible.

WordPress reduces image quality to balance file size and loading speed. By default, WordPress compresses JPEG images to 82% of their original quality when creating resized versions. This compression helps improve website performance by reducing the amount of data that needs to be transferred during page load times. You can adjust this setting using a plugin or custom code if desired.


Optimizing images is an essential part of any WordPress website. By choosing the right image format, compressing images with plugins, adding alt text to images, optimizing thumbnails and favicons, organizing media libraries efficiently, and using responsive images, you can improve your website’s speed and performance.

By following these tips, you can ensure that your website is both visually appealing and fast-loading. Don’t let slow-loading pages hurt your SEO or drive away potential customers; implement these strategies today!

If you need help with WordPress Image Optimization or other web development services, contact Amadeus Consulting. Our experienced professionals can assist you in making your website both visually attractive and optimized for speed.

Our passion is empowering businesses to connect with customers and scale their digital presence. With strategic website building and SEO, we help companies expand their reach and grow their brand online. Let Amadeus Consulting build and optimize your website!

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