BabaPinnak

Auto WebP Converter & Logger is a lightweight, powerful plugin designed to optimize your website’s media library. It automatically converts JPEG and PNG images to the WebP format during upload — significantly reducing file size without sacrificing quality. It also logs each conversion (or failure) and supports uploads from both the Media Library and third-party plugins like Instant Images.
Key Features:
<ul>
<li>Automatic WebP Conversion: Converts JPEG and PNG images to the WebP format on upload.</li>
<li>Custom Quality Setting: Define your preferred WebP image quality (0-100).</li>
<li>Original File Handling: Choose whether to delete the original JPEG/PNG after successful conversion.</li>
<li>Detailed Logging: Enable logging of all conversions and errors in a secure log file.</li>
<li>GD Library Check: Automatically detects if the GD library is missing and shows admin notices.</li>
<li>Secure and Optimized: Only images smaller than 10MB are processed for optimal performance.</li>
<li>Admin Settings Panel: Easy-to-use settings page under WordPress Settings > Images to WebP.</li>
</ul>
Important: 
Requires the GD library with WebP support enabled on your server.

Auto WebP Converter & Logger

Automatically converts uploaded JPEG and PNG images to WebP format for faster performance and logs conversions for transparency.

kodeknight

This plugin adds an extra image widget in Elementor that converts the added image to webp and loads webp image on front end if the browsers supports webp images. If user’s browser does not support Webp image format then original image is loaded.
<ul>
<li>Converts JPEG and PNG images to WEBP on the fly.</li>
<li>Helps to improve Google page insights score.</li>
</ul>

Webp Image Block

This plugin adds an extra image widget in Elementor that converts the added image to webp and loads on front end if the browser supports webp images.

Auto WebP Converter & Logger vs Webp Image Block