lehmannlabs

LehmannLabs WebP Optimizer is focused on one core goal: faster page load times.
The plugin converts your WordPress images to WebP and serves WebP files on the frontend whenever available. This reduces image payload and helps improve Core Web Vitals and user experience.
It was developed for WordPress websites built with Elementor and works well with typical Elementor image output (including image widgets, carousels, and background image use cases).
Unlike many plugins in this category, LehmannLabs WebP Optimizer is fully free to use, with no advertising, no tracking, and no premium upsells. Many competing plugins are either limited in their free version or are generally only available as paid products.
Tested with: 
– Elementor v3.35.6 
– Elementor Pro v3.35.1
Key benefits: 
– Faster frontend image delivery through WebP replacement 
– Completely free, with no ads and no paid upgrades 
– No feature limits in the free version and no paid-only core workflow 
– Optional auto-conversion on upload 
– Batch conversion for existing media 
– Safe fallback strategy and backup/restore tools 
– No external API calls, no tracking
Main features: 
– WebP generation for full-size and intermediate image sizes 
– Output modes: 
 – Picture mode (recommended): WebP source with fallback image 
 – Direct mode: direct URL/srcset replacement to WebP when available 
– Original image backup to <code>uploads/slimage-backup/YYYY/MM/</code> 
– Optional resize with configurable maximum edge length 
– Batch tools in wp-admin: 
 – Scan & Optimize 
 – Delete WebP Files 
 – Restore Originals 
– Site Health integration for WebP capability checks

LehmannLabs WebP Optimizer

Improve page speed in WordPress with a free WebP optimizer for Elementor workflows. No ads, no tracking, no paid upsells.

CodingBunny

CodingBunny Image Optimizer is a powerful and easy-to-use image optimization plugin for WordPress. It helps you improve your site’s performance by optimizing images, converting them to the WebP format, and resizing them automatically upon upload.
<h4>Features</h4>
<ul>
<li>New conversion method via browser to avoid using server resources.</li>
<li>Automatic image optimization upon upload.</li>
<li>Conversion to WebP and AVIF format.</li>
<li>Automatic image resizing.</li>
<li>Option to delete original images after conversion.</li>
<li>Disable WordPress default big image threshold.</li>
<li>Preload critical image (LCP) for better Core Web Vitals scores.</li>
<li>Lazy loading: images load only when visible to the user.</li>
</ul>
<h4>PRO Features</h4>
<ul>
<li>Option to set WebP and AVIF quality conversion</li>
<li>Disable WordPress unused image thumbnails: WordPress generates multiple thumbnails for each uploaded image. Choose which of these thumbnails you want to include when the images are optimized.</li>
<li>Bulk image optimisation: this option allows you to simultaneously optimize all or several selected images in the library.</li>
<li>Fix image attachments: fix all image attachments in the media library.</li>
<li>Unused images cleaner: this option identifies unused images within the site.</li>
<li>Duplicate images cleaner: this option identifies duplicate images within the media library.</li>
<li>Watermark: add a watermark to your images to protect them (now also supports text watermark).</li>
<li>Orphan Thumbnails cleaner: find and delete orphaned thumbnail files.</li>
<li>Cleaning Product Images: delete images associated with the WooCommerce product when it is deleted.</li>
<li>Alternative Text generator: automatically generates the ALT attribute for images.</li>
<li>Remove Metadata: automatically remove unnecessary metadata from images (requires Imagick).</li>
<li>Image Protector (add-on): advanced system for protecting against unauthorized copying and downloading of images.</li>
<li>Image Organizer (add-on): organize your images by assigning custom categories.</li>
</ul>

CodingBunny Image Optimizer LITE

Image Optimizer Lite is a WordPress plugin that optimizes, converts images to WebP or AVIF on upload, and resizes them to specified dimensions.

LehmannLabs WebP Optimizer vs CodingBunny Image Optimizer LITE