Jewel Rana

Halka WebP Image Optimizer hooks into the WordPress upload pipeline to silently convert JPEG and PNG images to WebP during upload.
It is a minimalist, performance-first optimizer. Unlike “bloated” suites, Halka focuses on a zero-configuration approach to keep your server load light (“Halka” means light). It is designed for users who want WebP conversion without the database overhead of larger plugins. No external APIs, no credits required — everything happens locally on your server.
Features
<ul>
<li>Convert JPEG, PNG (and optionally GIF) to WebP on upload</li>
<li>Configurable quality per format</li>
<li>Optional maximum dimension cap (auto-resize on upload)</li>
<li>Strip EXIF/IPTC metadata to save extra bytes</li>
<li>Optionally delete the original file after conversion</li>
<li>Bulk converter — process existing Media Library images in small batches</li>
<li>Per-image Convert to WebP button in the Media Library list view</li>
<li>Server support badge so you know what your host can do</li>
<li>Zero external dependencies — uses WordPress’s built-in <code>WP_Image_Editor</code></li>
</ul>

Halka WebP Image Optimizer

Automatically compress and convert uploaded images to WebP for faster page loads.

Evan Norton

Upload a JSON file generated by Google’s Lighthouse website auditing tool and this plugin will compress and replace all flagged images using the reSmush.it API.
<h3>Instructions</h3>
<ol>
<li>Run <a href="https://developers.google.com/web/tools/lighthouse/" rel="nofollow ugc">Lighthouse</a> on the page of your website you want to optimize images. The easiest way to do this is <a href="https://developers.google.com/web/tools/lighthouse/#devtools" rel="nofollow ugc">using Chrome Developer Tools</a>, but you may also utilize the <a href="https://developers.google.com/web/tools/lighthouse/#extension" rel="nofollow ugc">Lighthouse Chrome Extension</a> or <a href="https://developers.google.com/web/tools/lighthouse/#cli" rel="nofollow ugc">run an audit on the command line using Node</a>.</li>
<li><a href="https://developers.google.com/web/tools/lighthouse/#json" rel="nofollow ugc">Download the report as a JSON file.</a></li>
<li>In the WordPress Dashboard, navigate to <code>Media -> Lighthouse Image Optimizer</code>, upload the JSON file and click “Optimize Images.”</li>
</ol>

Image Optimizer for Google Lighthouse

Upload a JSON file generated by Google's Lighthouse website auditing tool and this plugin will compress and replace all flagged images using the  …

Halka WebP Image Optimizer vs Image Optimizer for Google Lighthouse