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.

Nitin Singh

Image Ninja – Convert Images to WebP & AVIF on Upload is a lightweight WordPress plugin that automatically converts JPEG and PNG images to modern WebP and AVIF formats upon upload. The plugin improves website performance by optimizing image file sizes without compromising quality, leading to faster page loading times.
<h3>Key Features</h3>
<ul>
<li>Automatically converts JPEG and PNG images to WebP and AVIF formats during upload.</li>
<li>Allows configuration of WebP and AVIF image quality in the settings.</li>
<li>Enhances website performance by reducing image file sizes.</li>
<li>Simple settings interface under <code>Settings > Media</code> for easy customization.</li>
<li>Lightweight and developer-friendly codebase.</li>
</ul>
This plugin is ideal for website owners looking to improve load times and optimize image delivery, especially on mobile devices and slow connections.
<h3>Why WebP?</h3>
WebP is a modern image format developed by Google that provides both lossy and lossless compression for images on the web. Here are some benefits of using WebP:
<ul>
<li>Smaller File Size: WebP images can be up to 30% smaller than JPEGs and PNGs with no noticeable loss in quality, resulting in faster page load times.</li>
<li>Transparency and Animation: WebP supports transparent backgrounds like PNG and animated images like GIF, making it a versatile choice.</li>
<li>Improved Compression: WebP offers better compression algorithms compared to traditional formats, allowing for high-quality images with lower storage requirements.</li>
</ul>
<h3>Why AVIF?</h3>
AVIF (AV1 Image File Format) is a cutting-edge image format derived from the AV1 video codec, offering even better compression than WebP. Here’s why AVIF is beneficial:
<ul>
<li>High Compression Efficiency: AVIF can reduce image sizes by up to 50% compared to JPEG, while maintaining similar or even higher visual quality.</li>
<li>HDR Support: AVIF supports High Dynamic Range (HDR), allowing for more vibrant and detailed images, especially on modern displays.</li>
<li>Advanced Features: It includes support for transparency, animation, and a wider color gamut, making it suitable for various types of web content.</li>
</ul>
<h3>License</h3>
This plugin is licensed under the GPLv2 or later license.

Image Ninja – Convert Images to WebP & AVIF on Upload

Automatically convert JPEG and PNG images to WebP and AVIF formats during upload to optimize your WordPress site’s performance.

TIO – The Image Optimizer – Smart Image Compression & Optimization, Built for the Web vs Image Ninja – Convert Images to WebP & AVIF on Upload