Compressing images for website is a common WordPress optimization feature to increase page speed and user experience.

Optimize images for website to make the size smaller. When the page loads, it takes less time to load the image resources. 

It improves the loading time of the site. When a page contains more than 5 or 6 images, it adds to the page size. By reducing the image size, we can bring the web size to below 1MB. 

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Performance Tools clearly show that the bigger the image size, the greater will the loading time.

Caching and Minification are part of site optimization. But plugins like FVM, Autoptimize and WP Rocket either optimize the code or static caching of the site. 

Optimize images online is a tedious feature for bulk images. WordPress Image Compressor plugins help to do this resource intensive tasks more simple. Web Image optimization can be done by converting them to WebP format.

Website image compression is tough job to do it manually. It involves complex algorithm and tasks. It can be simplified using an online photo optimizer.

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Imagify is a great website image optimizer that can do bulk optimization of images. In this review we are going to see the images optimization feature and web optimizer case-study.

compress images for web - image optimizer

Imagify Pricing – Image Optimizer

There are 3 types of subscription plans for Imagify. All plans start with a free account. No need to provide any credit card. The pricing is based on a pro-rata basis. 

  1. Starter
  2. Infinite 
  3. Growth

For the starter plan, 20MB of image compression is provided as free per month. For every additional extra GB, it costs $8. It has approximately 200 images. If your blog is small and doesn’t post more than 30 to 50 posts per month, then the free version is sufficient. 

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The infinite plan costs $9.99/month, and you can compress unlimited images per month. It has a fair use policy. If you have a network of blogs and a huge number of images, then this plan suits you. It’s especially a good offer for photography blogs. 

The growth plan is a medium plan which costs $4.99/month. You can compress upto 500MB per month, and any additional GB costs $5. It can compress approximately 5000 images. You can use this plan on 15 blogs, each uploading at least 500 images per month. 

Imagify Features – Image Optimizer

No complex settings to configure. All the features can be enabled using a simple interface. You can always look at the difference between the original and compressed image at any time. 

select folders for web optimized images - image optimizer

Using the available add-ons, you can easily compress your images in any CMS. WordPress has a plugin that is easy to install and less resource-intensive. All the images will compress on upload or do bulk optimization if they are already uploaded. 

Image optimization for website can be done in stages by this image optimizer. Initially you can select a set of images to check for reduction. Compress images for the web if you have too many on an article. The wordpress img tag is useful for PNG, JPEG kind of images. But these are bulky.

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You can use the API features with an access token. You can program a script or tool to compress the related images. One can always decide which plan to use with the help of technical support. 

Upgrade and Downgrade from any plan is possible at any time. The free version itself acts as a trial version. 

Imagify Settings

General Settings

Optimization level – Normal, Aggressive, Ultra

Three levels of compression. 

three levels of image compression - image optimizer

In the normal mode, it will optimize the images without a reduction in quality. Perfect quality can be seen.

But the reduction in file size will be less. Better suited for photography blogs. If you want to retain the 4K resolution or higher, you can choose this option. 

S.NoOriginal Size (KB)Normal(KB)Saving (%)
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The aggressive mode is a blend of a small loss in image quality and maximum file weight reduction.

It suits most of the bloggers whose users are using the 1920×1080 kind of resolution. PCs and mobiles load the pages quickly with lossless compression. 

S.NoOriginal Size (KB)Aggressive(KB)Saving (%)

The ultra mode provides the maximum level of compression as an image optimizer. Huge savings in file size can be seen here.

Due to this, the quality of images may sometimes degrade. If you have too many images in your article and the speed test shows heavy image size, this option suits you. 

S.NoOriginal Size (KB)Ultra(KB)Saving (%)

The auto-Optimize image on upload: Instead of optimizing the image after upload, this will automatically compress the image uploading to a WordPress site. Due to this, there is a slight delay in upload. 

Backup Original Images: The original images will be kept in a separate folder. After changing your mind, you decide to restore the original versions of the images; this option will help you. 

Keep all EXIF data from your images: When the image or picture is taken, much metadata gets created and stored in the image. It identifies the shutter speed, ISO, exposure and many other things. Photography blogs and websites like to keep this data. 

website image optimization - image optimizer

Optimization – Image Optimizer

WebP format

WebP is the new image format created by Google. It supports both lossy and lossless compression.

It creates small-size files of the same quality or higher quality than JPEG, PNG and GIF formats with a greater reduction in file size. Almost all the new browser versions support this format, except for the old browser. 

how to optimize images for website

If your image is in traditional image format, then you need a plugin like Imagify to convert them to WebP formats and display them. 

Imagify can display these images either using rewrite rules or <picture> tags. You can also specify a CDN in this setting if you are using one with help of this image optimizer. 

Media Library

You can resize larger images to maximum width greater than the largest thumbnail width. It will reduce the size of large images by 80%. 

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Files Optimization

You can optimize the images of different sizes, as mentioned in the media library. For example, thumbnail, medium, large etc. It will affect the Imagify monthly usage. 

Custom folders

You can add a custom theme, plugin folders for image compression and optimization. In that way, it will also optimize images other than those uploaded to your post.

If you have heavy load images in your theme or other folders, this option can be useful. 

Image Compression Level – Test Study

To see the benefits of Imagify with an Aggressive compression level, I applied it to one of my sites with many images. The following are the results. 

It optimized a total of 400 original images. Their actual size was around 191MB. It included mostly the images uploaded to the posts.

After Aggressive compression, reduced the size to 66MB. There was a 66% reduction in the size of images. That too, without compromising the quality of the images for this blog. 

Check Media > Library in the WordPress dashboard. You can see the savings for each image. 

A typical image of 268.25KB was compressed to 108.83KB using an Aggressive level of optimization. The original saving was 59.43%, and the overall saving was 73.64%. You can also see the difference between the original image and the optimized one. 

Other options include –

  1. Re-optimize to Ultra
  2. Re-optimize to Normal
  3. Restore Original

The percentage of compression depends on the image type, quality and size. Though the same mode is used, different images are compressed to different percentages. It will compress a typical photoshop image more than a screenshot. 


Another interesting contradiction is that if you compress using one mode and re-optimize using another, the saving will not be accurate. 

For example, if you have optimized using Normal and then Ultra, the saving will be less than the direct compression mode of Ultra. 

Also, when you revert to the original compression mode from another, the size difference won’t be the same. I also found that the Normal mode of compression inflated the size of the original image compared to the Aggressive and Ultra modes.

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