3 Best WordPress Image Optimizers
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Ultimate Guide: 3 Best WordPress Image Optimizers to Rocket Your Website Speed!

Article Updated On: February 12, 2023

I will cover the 3 Best WordPress Image Optimizers to make your choice easier. I’m talking about EWWW Image Optimizer, ShortPixel, and Imagify. EWWW Image Optimizer has over 1 million active installations! ShortPixel has over 300,000! Imagify has over 700,000! I’m talking about the best of the best here.

Your website speed matters! I’m sure you know by now, but Google takes the speed of your webpage into account with how it ranks your website. Google confirmed that in an April 2010 Announcement. Many other factors play into your Google ranking, most of which we can control. Page speed is one of those we can. One of the biggest offenders when it comes to website speed is images. Images account for a large portion of what gets sent to the client and downloaded by their browser.

Make sure you don’t skip any part of this article. I have a direct comparison of image compressions and a chart which covers which plugin has the features you want.

EWWW Image Optimizer - WordPress Image Optimizers
EWWW Image Optimizer

Smaller Images, Faster Sites, Happier Visitors. Comprehensive optimization.

ShortPixel - WordPress Image Optimizers

Optimize images & PDFs smartly. Create and compress next-gen WebP and AVIF formats. Smart crop and resize.

Imagify - WordPress Image Optimizers

Compress images & convert WebP with the best WordPress image optimization plugin. Optimize images 1-click.

Why Image Optimization is Essential for Website Speed and SEO Success: WordPress Image Optimizers

Faster Page Loading

Most websites today use CSS and JavaScript for the website layout and experience. But the rest of the website consists of text and images. Images will be downloaded by the client when they view a webpage on your site. Depending on how many are on your site, they can significantly slow it down.

Improved User Experience/Reduced Bounce Rate

Typically you have between 3 – 5 seconds to capture your website visitor’s attention. If your website loading time is longer than that, they won’t bother waiting around for a slow site. Faster-loading pages will keep your users on the site longer, which is the goal.

Better Search Engine Ranking

As I talked about in my opening paragraph, Google uses page loading speed as one of many factors to rank your pages. Faster-loading pages will rank above slow ones.

EWWW Image Optimizer Plugin

EWWW Image Optimizer

EWWW Image Optimizer has over 1 million active installations. This statistic speaks volumes about its performance, features, and pricing. You can bulk compress your images that already exist. Automatically compress new uploads, saving you time. You can control which resizes to generate/optimize. You also get a 30-day cloud backup of originals.

Why we like EWWW Image Optimizer WordPress Image Optimizers Plugin

EWWW Image Optimizer has a free trial for 30 days. In that 30 days, you are allowed to optimize 1,000 images. After the 30-day trial, you need to convert to a paid plan. You also get 1 CDN allotted to you. The CDN allows you to offload the storage and delivery of your images to the Easy IO CDN servers. You also get 30 days of cloud backup of original images.

Disadvantages of using EWWW Image Optimizer
If you run multiple websites, you will need to purchase a larger tier package. They do have 3 Tiers, all with unlimited image optimization. Standard – 1 website. Growth – 10 websites. Infinite – Unlimited websites.


ShortPixel has over 300,000 active installations, which is not as many as other plugins, but don’t let that deter you. It has all the same features and does a great job compressing images. The plugin makes it easy to accomplish all your image optimization needs. Bulk optimize, auto-optimize on upload, and auto-WebP conversion, to name a few. You can choose to locally backup your original files.

ShortPixel Image Optimizer Plugin

Why we like ShortPixel WordPress Image Optimizers Plugin

ShortPixel has a Free Tier. If you stay within its limits, you never have to pay. The free tier offers you 100 credits a month on unlimited sites. They also offer free credits for non-profits if you contact them. They also recently started offering an Unlimited plan.

There are two main drawbacks. The first one is if you choose the monthly unlimited plan, it’s only for one website. So if you run multiple sites, you must purchase multiple unlimited plans. The second is that it integrates with CloudFlare, but could be difficult with other CDNs.

Imagify Small Icon


Imagify is a great choice, with over 700,000 active installations. It has all the features you will need to optimize all your images. Bulk optimize, auto-optimize on upload, and auto-WebP conversion, to name a few. You can choose to locally backup your original files.

Why we like Imagify WordPress Image Optimizers Plugin

They also offer a free-for-life Tier, which allows you to optimize 20 MB a month on unlimited sites. If 20 MB is not enough, you can purchase a cheap upgrade which will give you unlimited images on unlimited sites. Imagify is a great option if you run multiple websites with a lot of images. Imagify also makes it possible to integrate with 3rd party CDNs.

Disadvantages of using Imagify
I honestly could not find any disadvantages to Imagify.

Comparing Image Size Outputs from the Top 3 WordPress Image Optimizers Plugins

JPG – Lossy Compression

This is a direct comparison of the same 250 KB JPG image, uploaded and compressed with Lossy file compression.

PluginOriginal File SizeCompressed File Size% SavingsCompression Type
EWWW Image Optimizer250 KB117 KB53.2 %Lossy
ShortPixel250 KB92 KB63.2 %Lossy
Imagify250 KB108 KB56.8 %Lossy

JPG – Lossless Compression

This is a direct comparison of the same 250 KB JPG image, uploaded and compressed with Lossless file compression.

PluginOriginal File SizeCompressed File Size% SavingsCompression Type
EWWW Image Optimizer250 KB236 KB5.6 %Lossless
ShortPixel250 KB237 KB5.2 %Lossless
Imagify250 KB236 KB5.6 %Lossless

PNG – Lossy Compression

This is a direct comparison of the same 669 KB PNG image, uploaded and compressed with Lossy file compression.

PluginOriginal File SizeCompressed File Size% SavingsCompression Type
EWWW Image Optimizer **669 KB110 KB83.6 %Lossy
ShortPixel669 KB454 KB32.1 %Lossy
Imagify669 KB411 KB38.6 %Lossy
** Note: EWWW Image Optimizer auto-converts PNG files to JPG in the conversion process resulting in much smaller PNG files.

PDF – Lossy Compression

This is a direct comparison of the same 134 KB PDF, uploaded and compressed with Lossy file compression.

PluginOriginal File SizeCompressed File Size% SavingsCompression Type
EWWW Image Optimizer **134 KB123 KB8.2 %Lossy
ShortPixel134 KB131 KB2.2 %Lossy
Imagify134 KB131 KB2.2 %Lossy

Make Image Optimization Easy: How to Choose the Right WordPress Image Optimizers Plugin for Your Website
Choosing Compression Type

Two types of compression can be used at various degrees to compress images. Lossy compression involves discarding the image data that is deemed less important. The result is a smaller image size, but some details and quality are lost. Lossless compression doesn’t throw away any data. It is the technique of encoding the data through algorithms that result in a smaller image size while keeping the quality.

Multiple formats supported (jpg, png, gif, pdf WebP)

One main thing you want from an image optimizer is that it supports all the file formats you use. For example, if you know you will need to compress PDFs, you will need to ensure whichever one you choose will support that file format. At the very least, it should support all JPG formats, PNGs, GIFs, PDFs, and WebP formats.

Auto-WebP conversion and usage

WebP is an image format developed by Google to provide high-quality, lightweight images for the web. The main advantage of WebP is that it can achieve similar image quality at much smaller file sizes. WebP also supports both still and animated images. Google Chrome, Mozilla Firefox, and Microsoft Edge browsers support WebP file format. Safari and Internet Explorer do not support WebP. Your image optimizer should know the difference and serve the appropriate file format to the correct browser.

Automatically compress new images

The last thing you want to do is manually compress images after you upload them. Your image optimizer should auto-magically compress the images after you upload them. The way it works is, you upload an image, that image gets set to the image optimizers servers, the images are compressed and sent back to your WordPress site, the original image is either deleted or backed up, and the newly compressed images are ready to use.

Bulk Image Optimization for pre-existing images

Another great feature your image optimizer should have is Bulk Image Optimization for pre-existing images. More than likely, you already have a website up and running serving assets. Once you install an image optimizer, you want your images optimized. You don’t want to waste time individually optimizing each image. You should be able to select them all, click a button, and have them all optimized.

Optimization of all image sizes (Thumbnail, Medium, Large, etc)

WordPress creates four different sizes of an image when you upload a single image (Thumbnail, Medium, Large, Full Size). It does this to have different image sizes available for all uses. You don’t want to serve a 1024×1024 pixel large image when you only need a small thumbnail. Your image optimizer should optimize all sizes of an asset that WordPress auto-generates.

Image backup

Another great feature that you might want to use is a backup of the Original image you uploaded. A standard feature should allow you to choose if you want the original image backed. Most image optimizers allow a local backup of the file on your servers. Some even back up the assets to their cloud servers, with a time limit on how long they store them.

Comparison of WordPress Image Optimizers – Plugin Features

Image Optimizer
Does it have a free tier/trial? **TRIALTIERTIER
What does free tier/trial include?1 Easy IO CDN site
30 days
1,000 Compressed Images
Credits a Month
Unlimited Websites
20 MB Per Month
Credit Card Needed for free tier/trialNONONO
Can a single API key be used on multiple sites?NOYESYES
Bulk Image optimization?YESYESYES
Optimizes all WordPress image sizes?YESYESYES
Auto-WebP Conversion?YESYESYES
Choose Compression Type?YESYESYES
Local File Backup?YESYESYES
Can you use 3rd Party CDNYESCloudFlareYES
File size limit – Max file size per image?Unlimited100 MB33 MB
Resizes Image On-the-fly?YESYESYES
Images are compressed on your server or theirs?THEIRSTHEIRSTHEIRS
Try It Today!Try It Today!Try It Today!
** The difference between a tier and a trial is this: A Tier will remain active forever with the allotted credits or restrictions a month. A Trial lasts for a limited amount of time/credits and once it’s over, you must sign up for a paid plan.
I may receive affiliate compensation for some of the links in this article if you decide to purchase a product. This does not add any additional cost to the products you purchase.
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