Mateusz Krosnowski

Optisize is a powerful yet lightweight WordPress plugin designed to automatically optimize your media library. It hooks into the upload process to ensure every image you add to your site is compressed and converted to WebP, significantly improving page load speeds and SEO performance.
Key Features: 
* Automatic WebP Conversion: Automatically converts JPG, JPEG, and PNG uploads to WebP. 
* Smart Compression: Maintains high visual quality while drastically reducing file sizes. 
* Bulk Optimization: Process your existing media library with a built-in batch processing tool. 
* Easy Toggle: Quickly enable or disable optimization directly from the Media Library. 
* Content Replacement: Automatically updates post content to point to the new WebP versions of your images.

Optisize – WebP Konwerter

Automatically compresses images on upload and converts them to the modern WebP format.

FizTool

Fiz Auto Media helps site owners manage common media and publishing tasks from one plugin.
Developed By FizTool. 
Plugin website: https://fiztool.com/
Main features include:
<ul>
<li>Image compression and WebP generation for supported media files.</li>
<li>Bulk compression workflow for existing Media Library images.</li>
<li>Automatic image alt text and description helpers.</li>
<li>Featured image tools for posts without thumbnails.</li>
<li>Duplicate post detection tools.</li>
<li>Auto post scheduling tools using WordPress cron.</li>
<li>Media cleaner tools for scanning and reviewing unused media before cleanup.</li>
</ul>
Fiz Auto Media runs locally inside WordPress and does not require an external account for its included features. If the Featured Image helper is enabled, WordPress may request external image URLs found in post content so those images can be imported into the Media Library after the required upload and edit permissions are confirmed.
The plugin uses WordPress capabilities, nonces, sanitization, escaping, and WordPress filesystem helpers where appropriate.

Fiz Auto Media

Compress images, bulk schedule posts, review duplicate posts, scan unused media, and improve image metadata from one dashboard.

Optisize – WebP Konwerter vs Fiz Auto Media