How To Compress Images: Everything You Need To Know

Images are an essential part of making a website look great. However, when used ineffectively, images can slow down a website. Don’t worry though, as it is possible to optimize images to negate this potential decrease in PageSpeed. One of the best ways to optimize the images on a website is to compress the images across the site. After reading through this article you’ll know everything on how to compress images for image optimization.

Compressing images is one of the easiest ways to optimize an image for PageSpeed. In this article I will detail what image compression is and how exactly is helps speed up your website and reduce load times.

Now let’s jump on in and discuss the benefits of compressing images, and breakdown exactly how to make it happen.


Introduction To Image Compression

Compressing Images

Image compression allows you to keep your website looking good all while decreasing the file size of the images on your website. The process involves a few factors that we will get into shortly.

All you have to do to effectively compress the images on your website is to utilize an image compression WordPress plugin. Image optimization plugins like the Smush Pro can even compress images in bulk.

Compressing images is just one factor in image optimization. In this article I will be discussing specifically how to compress images, and if you want to know everything about image optimization, I recommend you check out my full image optimization guide here.

Now let’s jump on in and discuss what it means to compress images, and breakdown exactly how to make it happen.

What Is Image Compression?

The process of compressing images involves decreasing the file size of an image with little to no – noticeable – decrease in image quality. This is done by removing or reducing redundant or unnecessary data from a picture file.

Certain tools are able to optimize images to save file space. This is useful for maintaining PageSpeed across a website and keeping load times quick and efficient.

Compressing images involves the following:
  • Removal of non-critical information
  • Reduces redundant image data
  • Slight decreases in image quality
  •  Decreases the amount of unique shades of colors used in images

Why Should You Compress Images?

Decreasing the file size of images can allow your web pages to load faster, which also means that PageSpeed across the website will increase as well. There is often a ton of redundant data within a single picture file and compressing it can remove this unnecessary data.
Loading images can take up a hindering amount of bandwidth, so it is beneficial to limit the amount of load time dedicated to images on any webpage. Compressing images is a easy and efficient way to keep your website running fast, as there isn’t much work involved with the process, yet the results can be game changing.

How To Compress Images


Image compression can be easily done through a WordPress plugin such as Smush

The plugin will decrease the file size of images while retaining an acceptable amount of image quality. This process involves removing non-critical or redundant information from images, such as code, text, colors, and size.

Let’s break down how to enable and use an image compressing plugin.

Here is a step-by-step process on how to compress images:
  1. Access the Wordpress toolbar
  2. Select “Plugins” on the Wordpress Sidebar
  3. Search for and select an image optimizing plugin (Smush)
  4. Access the new image optimizing plugin from the Wordpress sidebar (typically found at the bottom)
  5. Configure the plugin to lazy load images
  6. Select images you want to compress or utilize the bulk compress function

Now the images on your website should be optimized and compressed for faster load time and PageSpeed!

Remember, if you want to save some time, you can compress images in bulk by upgrading to Smush Pro. With the premium version of Smush, you can also convert all your images to WebP format. This is another essential way of compressing the images on your website and achieving image optimization

Compressing images is a great way to save massive amounts of file space on images. Hopefully one of the above methods work well for your needs! Now I want to share some helpful tips for compressing images.

Image Compression Tips

  • Double check images and make sure they still present correctly on your website
  • Utilize plugins efficiently compress the images on your site
  • Ensure that images remain at a respectable quality
  • Compress ALL images on your website (Smush premium can do it in bulk)
  • Art websites may want leave their images in a higher-quality format

Web Image Tips


Need help finding images for your website? Here are some tips that can help you get some images on your site. Don’t forget to compress your images after!

Web Image Tips:
  • Use royalty-free image hosting sites like to download images
  • Crop images to be 1200×600 for webpage images and 1280×675 for banner images
  • Avoid images that have excessively high file size
  • Compress Images across to reduce non-critical or redundant information
  • Convert images to WebP format for increased image optimization

More On Image Optimization

Compressing images isn’t the only way to optimize images for PageSpeed. Compressing the images on your website format is just one way of compressing images and reducing file size. 

If you want to know more about image optimization and other ways to compress images, I highly recommend you check out my full article on how to optimize images. In the article I share everything you need to know about image optimization, and I share all the tips & tricks in the book.

In the meantime, here is a roundup of all the image optimization tips you’ll need to keep your website running fast and efficiently.

Image Optimization Tips & Tricks:
  • Convert images to WebP format
  • Compress all images on your website
  • Use image compression plugins for WordPress
  • Keep images simple
  • Reduce the overall amount of images on each page
  • Do not use large images
  • Look out for decreases in quality when compressing images
  • Check that image formats are compatible for your readers

For more information on any and all of these tips, please check out my previously mentioned image optimization guide.

Other Ways To Increase PageSpeed

If you are interesting in compressing images and increasing load times, I would take a bet that you might be interested in some additional tips for increasing PageSpeed. Here is a list of other tips for increasing PageSpeed:

Factors that effect PageSpeed:

  • Use a fast web host
  • Pick a fast WordPress theme
  •  Cache Web Pages
  • Reduce unused JavaScript files
  • Reduce unused CSS files
  • Limit ad count
  • Reduce plugins

Each of these factors are an opportunity to increase the PageSpeed on your website. Do you want to know more about each of these PageSpeed tips?

Fortunately I have a full guide on how to increase PageSpeed, and I highly recommend you check it out! I go in to full detail over nine of the most essential tips for increasing PageSpeed across a website. This is a huge article, but it is worth adventuring through I promise.

Closing Thoughts

That’s everything you need to know on how to compress images! I hope this guide was helpful, and I wish you the best of success in achieving optimal PageSpeed and site health. Don’t forget to check my website for other valuable image optimization tips!

Please feel free to reach out to me or comment down below if you have any questions or need any additional guidance. Also feel free to share your own thoughts on image formats as well! I always appreciate an opportunity to learn more. See you next time!