NerdCow

Make your website faster than ever with TIO’s smart optimization.
Upload your images like you’ve always done before, and we’ll handle the rest. The Image Optimizer compresses your image and converts it to a modern file format. The result is the lightest image possible, without losing the quality.
Why choose our plugin?
The Image Optimizer uses smart optimization parameters tuned specifically for website images. It’s designed to be a simple companion that gives you the perfect image every time. We decide on the perfect balance of size and quality for your uploaded image. TIO automatically converts your new uploads to the best format (including modern formats like WebP and AVIF), applies lossless conversion or uses lossy compression settings that don’t affect the quality.
It’s perfect for small marketing teams who don’t have the time and know-how to optimise images manually and busy agencies who can’t afford the time to do it manually at scale.
We developed TIO to solve our own frustration with image optimizers. As a result, we were able to achieve results up to 35% file size reduction compared to other compressors. Going the extra mile helps ticking off the Google PageSpeed insights image checks, especially those for next-gen image formats.
How it works?
You upload your images as you normally do — one by one or in bulk, either way is fine. You can do it via the WordPress media library and by uploading directly into your pages.
We categorise what’s in the image to apply the right optimization settings. We use suitable compression and file format conversion, as well as remove unnecessary metadata.
As an example, screenshot compression makes sure to not sacrifice text sharpness, while plain illustrations with low colour depth use more aggressive compression since it won’t affect the quality nearly as much.
We optimise the source file, so WordPress thumbnails come pre-optimised as well.
Supported file formats
The only excluded file format is GIF. We support all other file formats that WordPress allows, including HEIC.
Try it for free
TIO allows you to generate one license key with 50 free image credits per website. That’s enough to test a few core pages and measure the impact.
<ol>
<li>Get a free license key at <a href="https://theimageoptimizer.com/key" rel="nofollow ugc">theimageoptimizer.com/key</a></li>
<li>Paste the key in Settings > TIO Image Optimizer</li>
<li>Upload images as usual — they are compressed automatically</li>
</ol>
Credit restoration for peace of mind
Uploaded an image by mistake or we didn’t optimise it to your liking? You can reclaim the credit straight from the WordPress Media Library, subject to our <a href="https://theimageoptimizer.com/terms" rel="nofollow ugc">Terms</a>.
And if we notice that your image was already optimal, we won’t charge a credit in the first place — nothing to reclaim there!
External Service Disclosure
This plugin relies on The Image Optimizer API, a third-party service hosted at <code>api.theimageoptimizer.com</code>, to compress images. When you upload an image with auto-compress enabled, the plugin sends the image file and your site URL to this API. The API returns a compressed version of the image, which replaces the original in your media library.
No data is collected or stored beyond what is needed to process the compression request and manage your credit balance.
<ul>
<li>Service website: <a href="https://theimageoptimizer.com" rel="nofollow ugc">theimageoptimizer.com</a></li>
<li>Terms of Service: <a href="https://theimageoptimizer.com/terms" rel="nofollow ugc">theimageoptimizer.com/terms</a></li>
<li>Privacy Policy: <a href="https://theimageoptimizer.com/privacy" rel="nofollow ugc">theimageoptimizer.com/privacy</a></li>
</ul>

TIO – The Image Optimizer – Smart Image Compression & Optimization, Built for the Web

Automatically compress and convert your images to modern formats (WebP, AVIF). Get a perfectly optimized image every time and speed up your website.

surviving404

Anek Image Optimizer is a professional-grade image optimization plugin built for speed, privacy, and flexibility. It is 100% free, runs entirely on your own server, and ships with zero telemetry — your images never leave your infrastructure.
<h4>Multi-Library Engine</h4>
Most optimization plugins lock you into a single backend. Anek supports three simultaneously:
<ul>
<li>Libvips — the fastest image processing library available (the same engine used by Cloudinary and Sharp.js). Runs as a native binary for extreme throughput and minimal memory usage.</li>
<li>Spatie Image — PHP-native library with selectable GD or Imagick drivers.</li>
<li>Intervention Image — alternative PHP library with GD or Imagick drivers.</li>
</ul>
<h4>Next-Gen Format Output</h4>
<ul>
<li>Compress original JPEG and PNG files in-place.</li>
<li>Generate WebP sidecar files alongside originals.</li>
<li>Generate AVIF sidecar files alongside originals.</li>
<li>All three outputs from a single source image, in one operation.</li>
<li>Built-in Apache/LiteSpeed <code>.htaccess</code> rules and Nginx config snippets for zero-PHP server-level delivery — browsers that support AVIF or WebP get them automatically; others fall back gracefully.</li>
</ul>
<h4>Deep WordPress Integration</h4>
<ul>
<li>Optimize directly from the Media Library — per-image buttons appear in attachment details.</li>
<li>Bulk optimization — compress your entire media library in one click with real-time progress.</li>
<li>Auto-optimize on upload — new images are processed the moment they are added.</li>
<li>File-system deep scanner — discovers and optimizes images outside <code>wp-content/uploads</code>, including theme images, plugin assets, and custom directories.</li>
</ul>
<h4>Preserve Originals</h4>
Toggle on “Preserve Originals” and a backup copy of every image is kept before compression. Restore any image to its original state at any time with zero data loss.
<h4>Quality & Exclusion Controls</h4>
<ul>
<li>Adjustable quality slider (0–100) per compression run.</li>
<li>Strip EXIF metadata to reduce file size further.</li>
<li>Set a minimum file size threshold to skip images already small enough.</li>
<li>Exclude specific paths from bulk operations.</li>
</ul>
<h4>100% Free, Zero Telemetry, Fully Self-Hosted</h4>
<ul>
<li>No data leaves your server. All processing happens locally.</li>
<li>Zero telemetry — no usage tracking, no analytics, no phone-home requests.</li>
<li>No API keys, no accounts, no subscriptions.</li>
<li>Full feature set available from day one with no freemium locks or upsells.</li>
</ul>

Anek Image Optimizer

Advanced image optimization for WordPress. Supports Libvips, Spatie, and Intervention. Generates WebP/AVIF and compresses images locally.

TIO – The Image Optimizer – Smart Image Compression & Optimization, Built for the Web vs Anek Image Optimizer