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Scans your site for the most common technical issues: missing alt text, oversized images, missing SSL, outdated plugins, pages without Open Graph tags, and more.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.

Bogdan Bendziukov

Looking for a WordPress image optimizer without an API key? Squeeze is a local WebP converter that lets you compress images in WordPress, convert uploads to WebP, and bulk compress your media library without ShortPixel-, Imagify-, or Smush-style monthly caps. Processing runs in your admin browser—unlimited squeezes, full privacy, and no uploads to third-party compression servers.
If you need a webp converter wordpress plugin, a shortpixel alternative without recurring API fees, or an image optimizer without api keys, Squeeze keeps optimization on your server and in your browser instead of a SaaS queue.
Unlike cloud-based plugins, Squeeze:
♾️ No compression limits — squeeze your entire Media Library, not just the first 100–500 images per month. 
☁️ No third-party servers — images never leave your site; processing happens locally in the browser (ideal for GDPR-sensitive and membership sites). 
⚡ Direct WebP conversion — convert JPG/PNG to WebP and replace the original file on disk (no duplicate copies cluttering storage). 
🖼️ Optimize on upload — compress in Gutenberg, GenerateBlocks, and the Voxel theme before files hit the server (Elementor on-upload squeeze is available in <a href="https://pluginarium.com/squeeze/#premium" rel="nofollow ugc">Premium</a>).
The result: smaller files, faster page loads, and lower hosting storage—without SaaS fees or API keys.
<a href="https://pluginarium.com/squeeze/" rel="nofollow ugc">Squeeze official website</a> | <a href="https://pluginarium.com/squeeze/squeeze-documentation/" rel="nofollow ugc">Plugin documentation</a>
<h3>🌟 New in 1.7.x</h3>
<ul>
<li>Direct WebP conversion: Convert JPG/PNG to WebP and replace originals—save storage without duplicate files.</li>
<li>Pre-upload compression: Shrink images in the browser before upload (Gutenberg, GenerateBlocks, Voxel create-post and gallery fields).</li>
<li>Three WebP delivery modes: Direct WebP, separate squeeze-webp folder with URL rewrite, or server-side delivery via .htaccess.</li>
<li>Voxel theme support: Pre-upload squeeze on multipart AJAX uploads in create-post and file/gallery fields.</li>
</ul>
<h3>✨ Key Features</h3>
<ul>
<li>Faster pages: Smaller images improve load time, Core Web Vitals, and mobile bandwidth use.</li>
<li>WebP conversion & serving: Convert to WebP and serve efficiently—choose Direct WebP, HTML URL rewrite, or .htaccess delivery for supported browsers.</li>
<li>Client-side squeezing: Compress in the browser; nothing is uploaded to external optimization servers.</li>
<li>Upload optimization: Compress on the fly during upload so optimized files land in your Media Library.</li>
<li>Gutenberg & GenerateBlocks: Squeeze images as you add them in the block editor.</li>
<li>Voxel theme: Compress before upload on Voxel create-post and file/gallery fields.</li>
<li>Bulk compression: Compress hundreds of Media Library images in one run (pause/resume supported).</li>
<li>Custom directory squeeze: Pick any folder under your site root and optimize all images inside it.</li>
<li>Exclusions: Skip images by URL or filename pattern (one per line).</li>
<li>Fine-tuned quality: Per-format tabs for JPEG, PNG, WebP, and AVIF (MozJPEG, OxiPNG-style PNG, and more).</li>
<li>Backup option: Keep a <code>.bak</code> copy to restore the original after squeezing.</li>
<li>Formats: JPEG, PNG, WebP, and AVIF.</li>
</ul>
<h3>⚜️ Premium Features</h3>
<ul>
<li>Image comparison in the Media Library (before/after sizes).</li>
<li>Resize originals to max width/height before squeeze.</li>
<li>Bulk squeeze from a page — all images used on one post or page.</li>
<li>Elementor integration — squeeze on upload while editing in Elementor.</li>
<li>CDN URL — map CDN image URLs to local files for all WebP delivery modes.</li>
<li>Priority support & updates</li>
</ul>
<a href="https://pluginarium.com/squeeze/#premium" rel="nofollow ugc">Explore Premium</a>
<h3>How does Squeeze work?</h3>
Open the Media Library, run Bulk Squeeze, or upload a new image — Squeeze runs Google Chrome team–backed codecs (the same family as Squoosh.app) inside your browser via Web Workers. No account, no API key, no off-site upload queue.
<a href="https://pluginarium.com/squeeze/squeeze-documentation/" rel="nofollow ugc">Full documentation</a>

Squeeze – Image Optimization & Compression, WEBP Conversion


Great plugin! I'd love webp support if possible.


Works great

Compress images in WordPress & convert to WebP — no API key, no quotas, no cloud. Unlimited local image optimizer; private browser-side compression.

MITS Image Optimizer vs Squeeze – Image Optimization & Compression, WEBP Conversion