Mahmoud Hamed

Snake Image Optimizer is designed for site owners who want a straightforward, local-first workflow for image optimization.
Instead of depending on an external optimization API, the plugin works with local server capabilities to generate WebP and AVIF files for uploads and WordPress-generated image sizes. Original files remain available as a safe fallback.
This version is intentionally focused on a small, practical workflow:
<ul>
<li>Local WebP/AVIF conversion for uploaded JPG and PNG images.</li>
<li>Safe fallback behavior that keeps the original files available.</li>
<li>Automatic AVIF/WebP delivery through WordPress image handling.</li>
<li>Lazy Load controls with a built-in page test tool.</li>
<li>Diagnostics to help confirm local WebP/AVIF support.</li>
<li>Activity logs for troubleshooting conversions and plugin actions.</li>
<li>Bulk processing for eligible existing Media Library images.</li>
</ul>
This plugin is best suited for users who want:
<ul>
<li>a local-first approach;</li>
<li>no dependency on a remote compression service;</li>
<li>visibility into what the plugin is doing through logs and diagnostics; and</li>
<li>a safer workflow that keeps originals available.</li>
</ul>

Snake Image Optimizer

Snake Image Optimizer is a local-first WebP/AVIF plugin with safe fallbacks, diagnostics, activity logs, and bulk processing.

WordPress.org

This plugin adds WebP and AVIF support for media uploads within the WordPress application. By default, AVIF images will be generated if supported on the hosting server, otherwise WebP will be used as the output format. When both formats are available, the output format can be selected under <code>Settings > Media</code>. Modern images will be generated only for new uploads, pre-existing images will only converted to a modern format if images are regenerated. Images can be regenerated with a plugin like <a href="https://wordpress.org/plugins/regenerate-thumbnails/" rel="ugc">Regenerate Thumbnails</a> or via WP-CLI with the <code>wp media regenerate</code> <a href="https://developer.wordpress.org/cli/commands/media/regenerate/" rel="nofollow ugc">command</a>.
By default, only modern image format sub-sizes will be generated for JPEG or PNG uploads – only the original uploaded file will still exist as a JPEG/PNG image, generated image sizes will be WebP or AVIF files. To change this behavior, there is a checkbox in <code>Settings > Media</code> “Output fallback images” that – when checked – will result in the plugin generating both the original format as well as WebP or AVIF images for every sub-size (noting again that this will only affect newly uploaded images, i.e. after making said change).
This plugin was formerly known as WebP Uploads.

Modern Image Formats


I love that it doesn't force you to generate all image sizes of the original format and avif, but just does the avif (or webp if you choose that). It would be really nice if it could rework old images, and maybe even modify the database to match. But still, excellent and should be installed first thing on all new WP sites in my opinion.


Easiest way to get AVIF images


Thanks for developing this plugin!It's my #1 plugin for image optimization!


So far so good!

Converts images to more modern formats such as WebP or AVIF during upload.

Snake Image Optimizer vs Modern Image Formats