6 Best WordPress Image Optimizer Plugins for 2018

WordPress Image Optimizer Plugins: Images are the essential part of websites, using images improves your content and blog as well as helps to attract viewers and grasp their attention. And also images make your content more engaging and interactive, it doesn’t mean that you should add as many images as you can because it decreases the free space on your server. In this case, you need to optimize your images for the web which helps to improve the speed of your WordPress website. And the best way to do this is by using WordPress compression plugins before you upload them to your website.

Optimizing your blog or content images is a great idea, it not only enhances the speed of your site but also optimizes the images with no loss in quality. There are several WordPress image compression plugins that allow you to easily optimize images in WordPress for better performance and improves SEO as well. Some plugins are for free with some restrictions but you can also upgrade to the paid model for using significant advantages.

In this post, we have shared the best options for WordPress Image optimizer plugins available on the WordPress market. If you are looking for the best free WordPress image optimizer plugins for your website, you will be grateful to know the list of these plugins.

List of 6 Best Free WordPress image Optimizer Plugins:

  1. EWWW Image Optimizer

EWWW Image Optimizer is one of the best WordPress Plugins which can compress both images and PDFs. This great WordPress Image Optimizer compresses images losslessly, meaning the size of the images gets reduced but the quality of the images never changes. It is easy to use and can automatically optimize images you upload to your blog as long as they’re either JPG, PNG, GIF, or PDF files. It also features bulk image optimization, in case you have uploaded images previously on your site. While it provides most of the features with the free plan, you can also use paid plan for more power.

EWWW Image Optimizer

One of the best function of EWWW Image Optimizer is that it performs all compression on your own servers that means you don’t need to connect to a third party service to get an API key. Furthermore, it also optimizes images originated by other WordPress plugins and saved outside your media library folders. Moreover, you can also keep backup of original images on the server, and even has the feature to convert JPG to PNG and vice versa.


  • Bulk Image Optimization.
  • Control Image Quality.
  • Free Image backups.
  • Image Resizing.


  • Little bit slow
  • Auto-optimization is not available on upload.
  1. WP Smush

WP Smush is one of the most popular WordPress image optimization plugins. With this plugin, any images you upload to your site will be automatically optimized without losing the quality. The plugin also packs a bulk optimization option which allows you to optimize up to 50 images at a time, and even you can set maximum image resolution so that your images will resize to more reasonable sizes while being compressed. You can also optimize images individually by heading over to your Media Library.

WP Smush

For the free version of the plugin, you don’t require to create an account to use API key. But the free version of the plugin doesn’t perform that well, so you can buy Pro Version for additional features such as PNG to JPG conversion, backup of original images, and optimizing each images multiple times. You can get Pro Version by signing up for full membership of WPMU DEV which costs $99 per month, and you will get full access to all themes and plugins.


  • Optimize images with no slowdown.
  • Automatic optimization.
  • You can set maximum image resolution.
  • Compatible with JPEG, GIF and PNG image files.


  • The backup option came with Pro Version only.
  • With Free Version maximum image size is limited to 1Mb.
  • Pro Version is expensive.
  1. Imagify

Imagify is another powerful WordPress Image compression plugin by WP Media available on the web. It is an online service that helps to websites to speed up by optimizing the images automatically in the media library to the compression levels that you choose and promises no loss in image quality. The plugin optimizes all your images, including thumbnails and retina images using three different optimization levels. It’s compatible with WP Retina 2X, WooCommerce and NextGEN Gallery. The plugin is fast, easy to set up, and supports PNG, JPG and GIF formats.


To use Imagify you need to create an account on their website then you will get an API key, save the key and it is ready to use. Its bulk optimization feature can also compress all your previously uploaded images with a single click. Furthermore, it also has the feature that allows you to remove or preserve EXIF data. With a free subscription, up to 250 images per month can be optimized for free with 25 Mb of data on registration. In case if you need more power, you’ll have to opt for the premium pricing plans, 500Mb data for $5.99, 1Gb data for $9.99 and 3Gb data for $19.99.


  • Provide support for multiple sites.
  • Backup original files.
  • Bulk optimization.
  • Quality of images can be controlled.


  • With the free plan, maximum image upload size is only 2Mb.
  1. Compress JPEG and PNG Images

Compress JPEG and PNG is a WordPress plugin created by the team behind TinyPNG, a free online service for reducing images sizes. Like other plugins, it automatically optimizes the images upon upload as well as resizes older images either individually or in a bulk. The plugin setting allows you to adjust the height and width of the images and allows you to pick which image size you want to optimize (thumbnail, medium or full size). Additionally, you are also enabled to set a maximum size for your original uploads.

Compress JPEG and PNG Images

With the free account, you can optimize only 100 images per month. For additional images, you’ll need to pay a small number of bucks. The best feature of Imagify is that metadata, copyright information, creation date and GPS location are preserved after conversion so that you can extract all the advantage of all the images uploaded to your website. Once you configure their API key in your wp-config.php file, there’ll no need to obtain multiple API keys for multiple site optimization.


  • Supports both PNG and GIF animated formats.
  • Preserves metadata, copyright information, GPS location, and creation dates.
  • A single key supports multiple site optimization.


  • Only 100 images are optimized each month with the free account.
  1. ShortPixel Image Optimizer

Another useful WordPress image compression plugin, ShortPixel Image Optimizer is a lightweight plugin that features the concept of automation in an outstanding way. This plugin can compress all your older images and PDF documents with a single click, while new images are automatically resized and optimized. You can also optimize any image you have on your website, even the images that aren’t listed in your multimedia libraries or any image added directly via FTP. Both lossy and lossless image compression, as well as glossy JPEG compression, are available for the most common image types and PDF files.

ShortPixel Image Optimizer

To get an API key you’ll need to submit your email ID. As soon as you activate the plugin, it starts compressing images and even stores the original images in separate folder allowing you to compare the original file with the compressed version to find out a difference in quality. A free account allows you to 100 image compression per month, if you want to increase this limit, you can upgrade to their paid plans. You can purchase additional credits for $4.99 for 5000 images, and you are charged only for successful optimizations.


  • No file size limit.
  • Free bulk optimization.
  • Features multisite integration with a single API key.
  • Compatible with WooCommerce, watermarks, WPML and WPML Media plugins.
  • Great for photographers.


  • Limited to only 100 images per month.
  • Less direct control.
  1. reSmush.it

reSmush.it is the most used free image optimization tool based on reSmush.it API. This plugin uses reSmush API to compress images and even allows you to pick the optimization level for your upload. It allows you to automatically optimize the images upon upload or resize existing images individually as well as in a bulk. It provides the reduction in the size of images based on various advanced algorithms.


The reSmush.it plugin enables you to define optimum compression level as necessary using the optimization level function. The downside of this plugin is that it doesn’t have different compression levels. Furthermore, the reSmush API accept JPG, PNG and GIF files but restrict to upload images below 5Mb in size.


  • Absolutely free and easy to use.
  • Pictures from the optimizer are possible to exclude.
  • Supports single, bulk compression as well as automatic compression on upload.
  • Saves the backup in optimization for restoration.


  • Doesn’t have various compression levels.
  • File size limit of 5Mb.


Thus these are some of the best free image optimizer plugins for 2018. Using these plugins any WordPress user can reduce their page loading time and also saves bandwidth. You can choose any one WordPress image optimizer plugins from above list to use on your blog.

If we’ve missed any quality plugin, let us know by dropping your comment below.