6 Best Image Optimizer Plugins WordPress (Most Popular 2021)

The first thing you should do to speed up your site is optimize your images.
Images play an important role in the design of your website.
They aid in bringing in new readers and assist make your posts more engaging. There are many WordPress blogs on the web that use image optimization, and it’s critical to a well-ranked website in the search engines.

What are the benefits of image optimization for your WordPress website?

It can greatly reduce the time it takes for your site to load.

This is accomplished by compressing the image files, lowering the resolution to the minimum required, and removing any unnecessary metadata (information such as when the picture was taken, what device was used etc).

Faster loading times are made possible by optimizing photos, and as your site’s loading speed rises, so does its Search Engine Optimization (SEO). The alt and title tags that you add to your photographs can help your site rank well. As search engines pick up key terms when searching the web, including tags with keywords in them will help your post be found more easily. Google’s ranking algorithm also takes into account the time it takes for a page to load, thus the speed of your website is critical.

Using plugins and automation, this process can be sped up considerably.

Before using any of these plugins, check to see if:

  • You can only upload images that are as large as you need them to be. Depending on the size of the photos on your webpage, your page may take longer to load. Unnecessarily huge photos, especially those with high resolutions, use up resources and slow down your page’s loading time. Your website will load faster if the photos are scaled down in size or compressed. Images can be compressed to reduce file size by removing information that isn’t necessary, including the date and type of camera used during capture.
  • The picture names you provide are related to your submissions. This will help your search engine optimization efforts. In search engine results, images with descriptive titles have a better chance of being found, which helps you optimize your content and drive more visitors to your site. To do this, simply add a keyword to the image’s title in the image’s filename.

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PluginsOriginal File SizeOptimized File SizeOptimization PercentageCompression Method
ShortPixel Adaptive Images1.65 MB622.27 KB63.17%Lossy
Imagify1.65 MB33.55 KB98.02%Aggressive (lossy image compression)
Optimole1.65 MB760 KB55 %Lossy and Lossless
Smush1.65 MB1.61 MB2.4%Lossless compression
EWWW Optimizer1.65 MB1.02 MB37.9%Pixel Perfect(lossless)
WP Compress1.65 MB1.18 MB28.3 %Lossless

ShortPixel518 KB169 KB67.36%Lossy
TinyPNG518 KB248.6 KB52%Lossy
Optimole518 KB274 KB47%Lossy and Lossless
Imagify518 KB338.7 KB34.64%Lossy
EWWW518 KB488.9 KB5.7%Lossless
Smush518 KB493 KB4.9%Lossless

ShortPixel Image Optimizer

ShortPixel Optimize any picture or PDF document on your website to improve its SEO rating, the amount of visitors it receives, and ultimately the number of sales it generates.

ShortPixel is an easy-to-use, lightweight, install-and-forget-about-it image optimization plugin that can compress all of your previous pictures and PDF documents with a single click. In the background, new photos are being automatically resized/rescaled and optimized. There are no restrictions on how you may use it.

Short Pixel requires a little amount of system resources and may be used with any type of web hosting, including shared, cloud, VPS, and dedicated. Even photos not included in Media Library like those in galleries like NextGEN, Modula, or imported through FTP can be optimized with this tool!

It is possible to compress images using lossy or lossless methods for the most popular image formats, including JPG, PNG, GIF and WebP, as well as PDF files.

We also provide glossy JPEG compression, a high-quality lossy optimization method. Specifically created with photographers in mind!

By optimizing your photos, you may improve your page speed and user experience, as well as your Google PageRank and attract more visitors.

Check the image compression on your site or compress a few photos to see whether it’s to your taste before implementing it.

When it comes to picture or PDF compression, why is ShortPixel the best option?

  • WordPress says this plugin has over 200,000 active installations, making it rather popular.
  • reduce the file size of JPG, PNG, GIF, and PDF pictures and documents (both static and animated).
  • option to convert PNG to JPG automatically if doing so would result in smaller pictures. Large pictures in PNG format will benefit the most from this setting.
  • there is no restriction on the file size
  • ability to freely convert any JPEG, PNG, or GIF (even animated ones!) to WebP in order to get even more Google love. How can I activate WebP?
  • option to use the picture> tag instead of img> to incorporate the produced WebP pictures in the front-end pages
  • All retina pictures are automatically compressed when using WP Retina 2x. What advantages do Retina screens have?
  • thumbnails and featured pictures should both be optimized. Individual thumbnails can be excluded from optimization by selecting them one by one.
  • capacity to optimize any picture on your website, including photos in NextGEN Gallery and any other image galleries or sliders
  • uses Gravity Forms’ post image field type to optimize pictures when they’re uploaded
  • It is possible to optimize featured pictures by resizing them automatically or by choosing one of two alternatives. Without the use of third-party plugins such as Imsanity
  • to RGB color space conversion from CMYK
  • Direct access to stellar assistance from the developers 24 hours a day, 7 days a week.
  • just a single click in your Media Library, you can compare lossy and lossless versions of your photos.
  • amazing for photographers: whether to preserve or delete the EXIF data from your pictures, and whether or not to use the lossless compression option
  • works properly with HTTPS and HTTP websites.
  • for big pictures, progressive JPEG is used to speed up display
  • Using a single API Key, you may run the ShortPixel plugin on different websites or multisites.
  • It’s safe to try out the plugin and put it to use. All of the original pictures may be restored with a single click, individually or collectively.
  • Bulk-optimize all of the existing pictures in the Media Library or any gallery with a single click
  • works admirably with WooCommerce and other e-commerce plugins.
  • compatible with NextGEN gallery, Foo gallery, and a wide range of other photo galleries and sliders
  • compatible with WP Engine-hosted websites as well as all other major hosting providers
  • compatible with the WPML and WPML Media plug-ins
  • ignore pictures that have already been optimized for the web
  • watermarking plug-in compatible
  • option to stop auto-optimizing photos when you upload them
  • Bonus pictures are those with an optimization level below 5%.
  • WooCommerce, WP unload S3, and WP Stateless are all compatible.
  • Optimizing your website for 40 days with detailed reports on the results


With over 300,000 active installs, Imagify is a well-known and effective WordPress plugin for image optimization.

Is there a rationale for its enormous acclaim?

This plugin, on the other hand, provides you a lot of power and freedom over picture optimization. As a bonus, it transforms your photos to the next-generation WebP file format.

Image Enhancement Evaluation Using Imagify

Somehow, Imagify decided that the JPG picture was already optimized and didn’t need any more compression. The PNG picture was compressed by 98.02 percent, from 1.65 MB to 33.55 KB. It compresses PNG images using aggressive lossy compression techniques.

What’s Great About Imagify?

You may choose between lossless and lossy picture compression with Imagify. As a result, you have a great deal of control over how well picture quality and image size are balanced.

When optimizing a picture, you have the option of converting it to WebP format as well.

It also works with all major picture file types, so you won’t have any problems with compatibility difficulties.

The WordPress backend even has an image resizer you may use to alter the picture’s proportions.

Is There Anything Negative to Say About Imagify?

While this isn’t the worst thing about Imagify, it is a significant drawback. Even for a new site, that’s quite low.

The average size of an unoptimized image on the internet is about 1 MB. You can only use the plugin to improve the quality of up to 25 high-quality photos each month.


With the free version, you may optimize up to 25 MB of pictures each month at no cost. You’ll have to subscribe to a premium plan if you want anything more.

Create a price illustration in your mind.

Plans start at $4.99 per month for optimizing 1 GB of pictures and go up to $55.99 per month for optimising 50 GB of images.

Plans for yearly subscriptions and one-time payments are both available.


When it comes to Imagify’s features, it’s hard to beat. With a monthly image optimization limit of only 25 MB for free users, it forces you to pay for a subscription.

As a result of these substantial picture optimization limits, Imagify is a great value for the money.

EWWW Image Optimizer

EWWW Image Optimizer is different from other image optimizers in that it optimizes just certain parts of your photos. Most image optimization plugins, such as ShortPixel and Imagify, use an API to connect to external servers to optimize images there.

EWWW Image Optimizer, on the other hand, optimizes the pictures on your own server. As a result, it’s free to use indefinitely, but you’ll have to put up with utilizing your own server resources to do so.

As a result, the plugin also provides you the option of connecting via an API (if you pay), so you may select the strategy that works best for you.

My testing are conducted on the self-hosted version for the sake of comparison.

Important Characteristics

Use your own server to optimize pictures, or connect to the API to use cloud optimization.

Improves the quality of JPG, PNG, GIF, and PDF images.

You have a choice of four compression settings, but not all of them are free.

Image resizing to the maximum possible size is automated.

Resize and dynamically serve pictures to a user’s device using a CDN (like ShortPixel’s adaptive images). This is a for-profit service.

Schedule optimization to run at a specific time of day, allowing you to save server resources by running it during non-peak hours.

Convert PNG to JPG and vice versa.

The process of generating and serving WebP graphics is described here.

Easy-to-use interface

EWWW Image Optimizer’s UI has just been redesigned and looks much better.

It does, however, provide a plethora of configuration options. That’s actually a good thing. All those choices will appeal to people who appreciate having fine control over their environment. On the other hand, if you’re a first-time user, you could be daunted (in which case I would recommend something like ShortPixel or Imagify).

For instance, the UI has a plethora of tabs:

Settings for EWW’s Image OPtimizer


Maximized Lossy Strict

The image is a JPG of unknown origin, size.

To view the full-size image in PNG format, click here. For the time being, this is the most extreme lossy compression option accessible for free.


The core EWWW Image Optimizer plugin is available for free and unrestricted use.

To be clear, paying is entirely optional.

Connect to the cloud optimization service for compression, CDN, and so forth.

Unlock all compression methods as well as a few extras.

Compression plans are extremely cheap, costing about $0.003 per picture. The cost to compress 3,000 pictures, for example, is $ 9.

The CDN plan, on the other hand, costs an additional $9 per month.


Optimole is a WordPress image optimization plugin filled with loads of new features to enable you fully automate all your image optimization needs.

Installing and activating the plugin is all that’s required. You won’t have to be concerned about slow site performance due to large picture files.

Test for Image Optimisation using Optimizol

When it came to compressing JPG and PNG pictures, Optimole delivered.

It decreased the file size of the JPG by 45 percent, from 484 KB to 217.8 KB. Compression is accomplished in two ways: one is lossy, the other is lossless.

Using both lossy and lossless compression, it was able to reduce the size of the PNG picture by 55 percent.

Advantages of Optimole

A unique feature of Optimole is its support for dynamic image serving, which replaces all your image URLs with cloud-based ones.

The Optimole server will now deliver all of your website’s optimized pictures when a user visits it. Your users will have access to photos of the highest quality, which will be dynamically scaled and fine-tuned to fit their unique viewport.

This method greatly speeds up the loading process and allows you to fully optimize your photos for all devices at the same time. You may also set it to reduce the image quality if the user is using a slower connection, just to be safe.

Is There Anything Bad with Optimole?

The major problem with Optimole is that it does not keep any of the resized and compressed pictures in your WordPress database. In real time, they are created and sent.

As a result, you have no access to the optimized photos and can’t use them anywhere else.


When using the free version of Optimole, your pictures will be optimized to receive about 5,000 unique monthly visitors. This is plenty for a newbie blogger.

And if your blog or website becomes popular, you may quickly upgrade to one of their premium plans.

the price of optimoles

Pricing starts at $22.52/month for image optimization for up to 25,000 monthly views and goes all the way up to $432.62 for websites with 3 million monthly visits.


If you’re just getting started with a WordPress website or blog, it makes sense to use Optimole because you’ll only get a little amount of traffic.

If your monthly traffic is fewer than 5000 visitors, you can send optimized pictures for free. The plugin is also ideal for users who want to eliminate the hassle of picture optimization by automating the process entirely.

However, if you need access to your optimized pictures, we recommend using one of the other plugins on this list.


The WordPress plugin version of the popular Kraken.io image optimizer, Kraken, is available for download. For the record, I utilize the Kraken.io web interface to optimize photos for client sites.

It’s a great, straightforward choice, however it’s missing some more complex capabilities seen in other plugins. For example, there is no support for WebP images.

Important Characteristics

  • Utilizes the Kraken.io compression service.
  • Compression techniques that use both lossy and lossless approaches.
  • Image resizing to a maximum size can be automated.
  • The chroma subsampling technique and the JPEG quality level can be selected manually.
  • Select the best-performing thumbnails from the ones you have.
  • Preserve the information that’s contained in an image’s EXIF data.

Easy-to-use interface

  • To begin, you’ll need to create a Kraken API key and link it to your website.
  • From there, you’ll be sent to a single options page where you may select the optimization technique to apply and:
  • Whether pictures should be optimized automatically upon upload.
  • Image scaling and resizing is performed automatically.
  • Which of the thumbnails should be improved?
  • Whether or not to keep EXIF data.

In terms of pricing, Kraken provides you with an initial 100 MB credit as a no-cost bonus. After that, plans start at $5 a month for up to 500 MB of pictures and go more expensive from there.


Uploaded media files are automatically compressed by Optimus. Size reductions of up to 70% are achievable depending on the image and the format. These savings help the blog page operate better by saving a few kilobytes each image. The most amazing aspect of the compression method is that the image quality is not compromised.


While the photos are being uploaded to a media library, the Optimus plugin simultaneously transmits them to the Optimus server, where they are processed and delivered back in an optimal format. In the end, the Optimus plugin compresses the image and saves it in the media library in less file size.

Optimizing pictures, including thumbnails, is done invisibly, behind the user’s back and without their knowledge. Optimus’ media library displays picture compression improvements as a percentage value for each file, as shown in the screenshot.

Image files can be purged of extraneous data that image processing applications save but isn’t required to view the image. Graphene quality is preserved but the overall picture size is drastically decreased. If you want, Optimus can preserve the original photo’s creator, EXIF, and copyright information, resulting in smaller compressional benefits.


  • JPEGs that develop with time
  • reducing the size of the uploaded file
  • Optimisation of a photo’s preview images
  • There’s no need to make any alterations to the code.
  • No EXIF or IPTC metadata should be removed if you don’t want to.
  • HTTPS image transfer connection is optional (Optimus HQ)
  • Conversion to the WebP image format is an option (Optimus HQ)
  • Disable automatic optimization throughout the upload procedure if desired.
  • WordPress Mobile App and Windows Live Writer Optimized
  • Faster PageSpeed improves the ranking factor
  • Faster load times for blog pages
  • WooCommerce integration is available.
  • WordPress multisite-support
  • Optimizing in large numbers (optimize existing images)
  • Image optimization using WP Retina 2x (incl. conversion to WebP)


The number of active installations is over one million, and the rating is 4.7 out of 5 stars (based on over 8000 reviews).

WPMU DEV’s image smusher is an amazingly effective and completely free WordPress plugin for image resizing, optimization, and compression.

In terms of speed and quality, Smush has been tested and shown to be the audience favorite image optimization plugin for WordPress, earning several awards along the way.

  • Compression with no loss of image quality (lossless)
  • Offscreen pictures can be deferred by using the Lazy Loader feature.
  • Up to 50 photos can be optimized at once using Bulk Smush.
  • Large pictures will shrink in size as they are compressed if the width and height are set to their maximum values.
  • Detection of pictures with an incorrect size – Find images that slow down your website quickly.
  • Improve the quality of photos that are not in the media library using Directory Smush.
  • Automated optimization – auto-smush your attachments concurrently for extremely fast upload compression
  • There is no limit to the number of photos you can optimize (no daily, monthly, or annual caps)
  • Gutenberg Block Integration — View all Smush statistics directly in image blocks
  • Multisite Compatibility — Global and individual Multisite settings are supported.
  • Smush can optimize PNG, JPEG, and GIF files for you.
  • WPMU DEV’s quick and dependable Smush API smushes pictures on super-speed servers.

Compress and resize large images up to 32MB in size automatically. Serve beautiful, high-quality pictures from 45 different locations across the world with the Smush Pro CDN.

One click will bulk optimize all of the images you’ve ever posted to your site. The greatest image optimizer WordPress has ever known can double your savings while also fixing your Google PageSpeed.

Which WordPress Image Optimizer Plugins should you choose?

It has CDN, lazy loading, and the ability to always show a version of the picture that is tailored particularly for the viewer’s screen and device.
You should choose Imagify if you want great compression, lots of options, and an intuitive user interface.

  • Smush – Lossless compression that is free and never expires (with a 5MB max for each image).
  • EWWW – For a free WordPress image optimizer and no file size restrictions. Just keep in mind that it only works if you host it yourself.
  • ShortPixel – For some of the best optimization and the slickest user interface.
  • TinyPNG – For the best optimization and the simplest of all user interfaces, choose TinyPNG.