wpaluchmits

MITS Image Optimizer is a professional image optimization toolkit for WordPress. It compresses images automatically on upload, batch-converts your entire media library to WebP and AVIF, configures Apache to serve next-gen formats automatically, and scans your site for common technical SEO issues.
<h4>Features</h4>
Auto-Compress on Upload 
Every JPG/PNG above a configurable size threshold is automatically scaled and compressed before WordPress generates its thumbnail sizes. No extra steps needed.
Bulk Compression 
Run a background batch job to compress all existing images in your media library. Progress is tracked and the job runs asynchronously – it won’t block your browser.
WebP Converter 
Batch-convert all JPG/PNG/GIF files in your uploads directory to WebP format. Runs in the background using WP-Cron or a loopback HTTP request. Supports both Imagick and GD libraries.
AVIF Converter 
Convert images to AVIF – the next-generation format that can be 30–50% smaller than WebP. Requires Imagick 7+ with AVIF support or PHP 8.1+ with GD <code>imageavif()</code>. The plugin detects support automatically and warns you if AVIF is unavailable on your server.
Apache .htaccess Configuration 
One click adds <code>mod_rewrite</code> rules to your <code>.htaccess</code> so Apache automatically serves <code>.webp</code> files to browsers that support them, with no code changes required in your theme.
Image Dimensions Scanner 
Detects images ≥ 1600 px wide that are used in posts or as featured images. Helps you find oversized images that slow down page loads, along with their file sizes, dimensions, and WebP/AVIF conversion status.
Site Audit 
Scans your site for the most common technical issues: missing alt text, oversized images, missing SSL, outdated plugins, pages without Open Graph tags, and more. Results include actionable recommendations.
Dashboard Widget 
A compact stats panel on the WordPress admin dashboard showing compression savings, WebP/AVIF conversion counts, and a link to the optimizer.
<h4>Requirements</h4>
<ul>
<li>PHP 8.0+, WordPress 6.0+</li>
<li>GD or Imagick PHP extension (for WebP/compression)</li>
<li>Imagick 7+ with AVIF or PHP 8.1+ GD (for AVIF conversion)</li>
<li>Apache + <code>mod_rewrite</code> (for automatic WebP serving via <code>.htaccess</code>)</li>
</ul>
Developed and maintained by <a href="https://mits.pl" rel="nofollow ugc">MITS</a> – a Polish web agency specializing in WordPress performance and development.
<h4>Privacy</h4>
This plugin does not collect any personal data and does not make any external HTTP requests.

MITS Image Optimizer

Auto-compress images on upload, bulk convert to WebP & AVIF, manage .htaccess WebP serving, and audit your site - all in one plugin.

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  …

MITS Image Optimizer vs Image Optimizer for Google Lighthouse