Arshad Shah

ArshadStudio Bulk Image Converter to WebP adds a dashboard screen that walks you through three steps:
<ol>
<li>Choose a conversion type — JPG to WebP or PNG to WebP.</li>
<li>Preview the matching images — the plugin lists every image in your Media Library that matches the selected format, with a thumbnail, filename, and file size.</li>
<li>Convert — optionally tick “Delete the original after conversion,” then start. A live progress bar shows status, and each thumbnail is marked with the percentage saved or a failure flag.</li>
</ol>
The plugin performs genuine pixel-level re-encoding using the Imagick extension (preferred) or the GD extension — it never simply renames a file extension. Every output file is verified against the WebP binary signature before it is accepted, so you can trust that the result is a real WebP image.
Conversion runs one image per request over AJAX, which avoids PHP execution-time limits on large libraries.
When “delete originals” is enabled, the Media Library attachment is repointed to the new WebP file and its metadata is regenerated, keeping the library consistent.

ArshadStudio Bulk Image Converter to WebP

Bulk-convert JPG or PNG images in your Media Library into real WebP files, with an optional toggle to delete the originals after conversion.

Chathurya Wijerathna

Fmtify automatically converts images uploaded to your WordPress media library into modern WebP and AVIF formats. Serve smaller, faster images with zero manual work.
Features:
<ul>
<li>Automatic conversion on upload</li>
<li>WebP and/or AVIF output</li>
<li>Multiple conversion backends: GD, Imagick, cwebp, cavif</li>
<li>Bulk convert your existing media library</li>
<li>Apache .htaccess rewrite rules for seamless serving</li>
<li>Nginx configuration snippet for manual setup</li>
<li>Compatibility wizard to detect server capabilities</li>
</ul>

Fmtify: Auto WebP and AVIF Converter

Automatically converts your media library images to WebP and AVIF for faster page loads.

ArshadStudio Bulk Image Converter to WebP vs Fmtify: Auto WebP and AVIF Converter