High-resolution images that are unnecessarily large in file size can drastically slow down page speed so the optimizing images is one way to increase the speed of your WordPress site. It not only makes your site to load faster, but can also help your site rank higher in the search results.

Gratifying is that this can be done automatically. With image optimization plugins available for WordPress, it’s no brainer to automatically compress all your images, with no perceptible difference in quality – and in return. For these reasons we propose to you to take a look at four WordPress image optimization plugins that can ensure your site is quick to load.

EWW Image Optimizer

EWWW Image Optimizer is arguably the best Image optimization plugin for WordPress. By default, this plugin performs lossless compression technique, so your image quality will looks exactly the same before and after the optimization. Another nice feature of this plugin is the ability to choose between lossy and lossless compression methods. 

One of the advantages of EWWW Image Optimizer is that the optimization process takes place within your own servers by default, instead of connecting to a third party service. This means your optimization tasks will require less time. It  should also be noted that this is the only plugin that does this thing.

WP smush

With more than 3 million downloads, WP smush  is one of the most popular image optimization plugins in the WordPress repository.  As is common with this sort of plugin, any images you upload to your WordPress site will be automatically optimized. WP Smush lets you compress JPEG, GIF and PNG images up to 32MB individually or in bulk, which as its name implies, enables you to tackle multiple tasks at once. This bulk option is limited to 50 files at a time in the free version of the plugin.

This plugin uses an external server for image compression. It also means that it doesn’t consume any of the CPU or RAM of your server but it will take some little amount of time to complete the optimization process.

Compress JPEG & PNG images

This plugin uses the popular online image compression services TinyJPG and TinyPNG to automatically compress your images, without resulting in any visible loss in quality. The plugin doesn’t offer many configuration options in its settings page, since you can’t modify the compression methods it uses. However, you can choose maximum resolutions for your uploaded images, pick exactly which sizes you want to compress (i.e. thumbnail, medium, etc.), and whether or not to preserve the copyright information of each file if available.

The free version allows you to compress up to 500 images per month (including the thumbnail, medium, and large variants) which is more than enough for most bloggers. After your 500 free images, it will cost you $0.009 per image.

ShortPixel Image Optimizer

Shortpixel Image optimizer is a simple, light-weight plugin that also offers PDF file optimization in addition to compressing JPG, GIF, and PNG images. It not only scores well when it comes to compression, it also packs a nice interface.  Also, ShortPixel enables you to choose between lossy and lossless compression methods, using the former by default.

The best part is that it has the option to leave the originally uploaded image untouched so you can always revert to original image or try lossless compression if the default lossy compression option doesn’t suit your images. A free signup entitles you to 100 image compressions per month, and credits for additional tasks can be purchased separately or earned by referring new users to the service. If you’re looking for a simple, easy to use and effective plugin, take a close look at ShortPixel.


All of these plugins delivers the good on some level, so it’s hard to pick one image optimisation plugin as the best. So, I recommend testing because this is the only way you’ll see what plugin gives you what you need.