Bicknell Digital

Convert to AVIF and Optimise automatically converts media library images to AVIF, stripping metadata, keeping your original uploads alongside the new files and updating all of your content to reference the optimised versions. The plugin keeps featured images, site logos, page builders, widgets and other stored URLs aligned with the converted image paths.
<h4>Key features</h4>
<ul>
<li>Automatic optimisation of newly uploaded JPEG, PNG and WebP files into AVIF.</li>
<li>Bulk optimisation tool that updates every post, page, featured image and option referencing your media.</li>
<li>Adjustable quality target so you can choose the balance between fidelity and file size.</li>
<li>Optional metadata stripping and original files retained beside the AVIF copies to keep your workflow flexible.</li>
<li>British English interface copy to keep everything consistent for UK sites.</li>
</ul>

Convert to AVIF and Optimise

Convert and optimise your WordPress media library to AVIF while keeping every reference to your images in sync.

HETWORKS

You probably know that the speed of your website is important for both user experience and for your search engine ranking. The people 
at TinyPNG.com offered this great service where you could upload your PNG images and shortly also your JPG images, to have the file size 
shrinked to much lower amount of data, without a noticable reduce of image quality. And that is great! Compare your Google pagespeed score 
before and after you shrinked your images. You will gain many points.
The disadvantage of using TinyPNG is that you had to use the service upfront, before you could upload your images into your WordPress 
medialibrary you had to upload them to TinyPNG and download the shrinked files again. When the images were already in your medialibrary you 
had to do this all over, also for the images that were cropped by WordPress into the different filesizes. With this plugin that is all history. 
You just upload your images and as part of the proces these images are processed by TinyPNG.
This is what TinyPNG say themselves: 
How does it work? TinyPNG uses smart lossy compression techniques to reduce the file size of your PNG files. By selectively decreasing the 
number of colors in the image, fewer bytes are required to store the data. The effect is nearly invisible but it makes a very large 
difference in file size!

WordPress Image shrinker

Reduce image file sizes drastically and improve performance and Pagespeed score using the TinyPNG API within WordPress. Works for both PNGs and JPGs.

Convert to AVIF and Optimise vs WordPress Image shrinker