Shane Bishop

<p>Are you frustrated by a slow website? Do over-sized images make you say “ewww”… Image optimization with EWWW Image Optimizer helps you make your site faster, improve your bounce rate, and boost your SEO. But most importantly, make your visitors happier so they keep coming back for more.</p>
<h4>Why use EWWW Image Optimizer?</h4>
<p><strong>Get all this for free:</strong></p>
<ul>
<li>Unlimited image optimization to compress images of any size</li>
<li>Local image optimization mode compatible with <a href="https://docs.ewww.io/article/43-supported-web-hosts" rel="nofollow ugc">most web hosts</a></li>
<li>Lossless JPG, PNG, GIF, and SVG image optimization (8% average savings)</li>
<li>WebP conversion compatible with all web hosts (60% average savings)</li>
<li>Optimize images from <a href="https://docs.ewww.io/article/84-plugin-compatibility" rel="nofollow ugc">any plugin</a></li>
<li>Image Detective to help you identify improperly scaled images and better optimize LCP images</li>
<li>Resize images at upload or in bulk</li>
<li>Lazy Load with auto-scaling for responsive images–uses properly-sized placeholders to prevent layout shift (CLS)</li>
<li>Sharpen thumbnail images for better quality</li>
<li>Adjust JPG and WebP quality (AVIF quality configurable in premium)</li>
<li>Control creation and optimization of individual WordPress thumbnails</li>
<li>Convert images to the best format (GIF to PNG, PNG to JPG or vice versa)</li>
<li>Local image backups</li>
<li>Preserve GIF animations in thumbnails</li>
<li><a href="https://ewww.io/contact-us/" rel="nofollow ugc">Free email support</a></li>
</ul>
<p>EWWW Image Optimizer is the only plugin that lets you optimize images using tools on your own web server (jpegtran, optipng, pngout, pngquant, gifsicle, cwebp). This requires the PHP exec() function and a <a href="https://docs.ewww.io/article/43-supported-web-hosts" rel="nofollow ugc">compatible</a> Linux, Windows, MacOS, or FreeBSD web server. <a href="https://docs.ewww.io/article/29-what-is-exec-and-why-do-i-need-it" rel="nofollow ugc">If your web server is not compatible, we offer unlimited lossless JPG image optimization and WebP conversion via our Compress API **for free*</a>.</p>
<p><strong>Upgrade to <a href="https://ewww.io/plans/" rel="nofollow ugc">Premium</a> for:</strong></p>
<ul>
<li>5x premium image optimization</li>
<li>PDF optimization</li>
<li>Automatic scaling for all images, even those in external CSS</li>
<li>One-click WebP & AVIF conversion and delivery</li>
<li>Enhanced responsive images that use correct dimensions for all devices</li>
<li>WebP image optimization</li>
<li>Deliver High-DPI images to devices with 2x and 3x screens (retina)</li>
<li>Watermark images</li>
<li>CDN delivery for images, CSS, JS, and fonts with custom domain name option</li>
<li>30-day cloud-based backups</li>
<li><a href="https://ewww.io/about/" rel="nofollow ugc">Premium support</a></li>
</ul>
<p><a href="https://ewww.io/plans/" rel="nofollow ugc">Premium plans</a> include SWIS Performance plugin with:</p>
<ul>
<li>Page caching</li>
<li>Enable browser caching with long cache lifetimes</li>
<li>Defer JS/CSS to eliminate render blocking requests</li>
<li>Minify JS/CSS</li>
<li>Critical CSS generation to prevent layout shifting (CLS)</li>
<li>Optimize font display/self-host Google fonts</li>
<li>Preload assets like fonts and LCP images</li>
<li>Reduce unused JS/CSS</li>
<li>Manage speculative loading</li>
</ul>
<h4>Automatic Everything</h4>
<p>Optimize images on your entire site with a single click. With <a href="https://ewww.io/plans/" rel="nofollow ugc">Easy IO CDN</a>, images are automatically compressed, scaled to fit the page and device size, lazy loaded, and converted to next-gen WebP and AVIF formats.</p>
<h4>Support</h4>
<p><a href="https://ewww.io/contact-us/" rel="nofollow ugc">We provide free one-on-one email support to everyone</a>.<br />
Do you have an idea to make EWWW Image Optimizer even better? <a href="https://feedback.ewww.io/b/features" rel="nofollow ugc">Share it and vote on future features</a>!</p>
<p>Found a bug? Report the issue on <a href="https://github.com/nosilver4u/ewww-image-optimizer" rel="nofollow ugc">GitHub</a>, and we’ll get it fixed!</p>
<p>You may report security issues through our Patchstack Vulnerability Disclosure Program. The Patchstack team helps validate, triage and handle any security vulnerabilities. <a href="https://patchstack.com/database/vdp/ewww-image-optimizer" rel="nofollow ugc">Report a security vulnerability.</a></p>
<h4>Bulk Optimize</h4>
<p>Optimize images, all from a single page. This includes the Media Library, your theme, and a handful of pre-configured folders (see Optimize Everything Else below). GRAND FlaGallery, NextCellent and NextGEN have their own Bulk Optimize pages.</p>
<h4>Optimize Everything Else</h4>
<p>Configure any folder within your WordPress install to optimize images. The Bulk Optimizer will compress theme images, BuddyPress avatars, BuddyPress Activity Plus images, Meta Slider slides, WP Symposium Pro avatars, GD bbPress attachments, Grand Media Galleries, and any user-specified folders. You can also use Scheduled optimization or run the optimizer from WP-CLI if that’s more your thing.</p>
<h4>Plugin Compatibility</h4>
<p>EWWW Image Optimizer has been tested with thousands of <a href="https://docs.ewww.io/article/84-plugin-compatibility" rel="nofollow ugc">plugins and themes</a>, here are just a few of the most common ones: BuddyPress (Activity Plus add-on too), Cloudinary, Easy Watermark, FileBird, FooGallery, GD bbPress Attachments, GRAND FlAGallery, Gmedia Photo Gallery, MediaPress, Meta Slider, Microsoft Azure Storage, MyArcadePlugin, NextGEN Gallery, Regenerate Thumbnails, <a href="https://weglot.com/integrations/wordpress-translation-plugin/demo/" rel="nofollow ugc">Weglot</a>, WP Offload Media, <a href="https://wpml.org/plugin/ewww-image-optimizer/" rel="nofollow ugc">WPML</a>, WP Retina 2x, WP RSS Aggregator, WP Symposium, <a href="https://docs.ewww.io/article/84-plugin-compatibility" rel="nofollow ugc">and more…</a></p>
<h4>WebP Images</h4>
<p>If you want simple, get automatic WebP conversion with Easy IO, and be done with it! Otherwise, you can generate WebP versions of unlimited images with the Bulk Optimizer. Deliver them to supported browsers with Apache-style rewrite rules, JS WebP Rewriting, or Picture WebP Rewriting. EWWW Image Optimizer even works with the WebP option in the Cache Enabler plugin from KeyCDN.</p>
<h4>AVIF Images</h4>
<p>AVIF conversion is built into the Easy IO CDN. Once your site is setup with Easy IO, edit the site settings to enable AVIF, and you’re done!</p>
<h4>WP-CLI</h4>
<p>Allows you to run all batch image processes from the command line, instead of the web interface. Optimize images even faster, run it in ‘screen’ or via regular cron (instead of wp-cron, which can be unpredictable on low-traffic sites). Install WP-CLI from wp-cli.org, and run ‘wp-cli.phar help ewwwio optimize’ for more information or see the <a href="https://docs.ewww.io/article/25-optimizing-with-wp-cli" rel="nofollow ugc">Docs</a>.</p>
<h4>CDN Support</h4>
<p><a href="https://wordpress.org/plugins/amazon-s3-and-cloudfront/" rel="ugc">WP Offload Media</a> is the officially supported (and recommended) plugin for uploads to Amazon S3, Digital Ocean Spaces, and Google Cloud Storage. <a href="https://docs.ewww.io/article/84-plugin-compatibility" rel="nofollow ugc">Check our compatibility list for details on other plugins</a>. All pull mode CDNs like Cloudflare, KeyCDN, Bunny CDN and Sucuri work automatically, but you will need to purge the CDN cache after you optimize images with bulk optimization.</p>
<h4>Translations</h4>
<p>Huge thanks to all our translators, <a href="https://translate.wordpress.org/projects/wp-plugins/ewww-image-optimizer/contributors" rel="nofollow ugc">see the full list</a>!</p>
<p>If you would like to help translate this plugin, <a href="https://translate.wordpress.org/projects/wp-plugins/ewww-image-optimizer" rel="nofollow ugc">join the team</a>.<br />
<a href="https://ewww.io/register/" rel="nofollow ugc">Signup to receive updates when new strings are available for translation</a>.</p>
<h3>Credits</h3>
<p>Written by <a href="https://ewww.io" rel="nofollow ugc">Shane Bishop</a> with special thanks to my <a href="https://www.iamsecond.com/" rel="nofollow ugc">Lord and Savior</a>. Based upon CW Image Optimizer, which was written by <a href="http://www.jacoballred.com/" rel="nofollow ugc">Jacob Allred</a> at <a href="http://www.corbanworks.com/" rel="nofollow ugc">Corban Works, LLC</a>. CW Image Optimizer was based on WP Smush.it. Jpegtran is the work of the Independent JPEG Group. PEL is the work of Martin Geisler, Lars Olesen, and Erik Oskam. Easy IO and HTML parsing classes based upon the Photon module from Jetpack.</p>


EWWW Image Optimizer

Serve webp images with fallback for browser which don't support

Excellent plugin!

I installed Imsanity which is another plugin I love and it recommended the EWWW Image Optimizer and I installed it and it drastically cut down the file size of the images as well as converting them to different file formats! I was so impressed it was so easy to use and the optimized images looked super fantastic! I couldn't tell the difference and it optimized all sizes of the different sizes that WordPress creates and it handled it all! Super thrilled to have found this gem!

I love this plugin!


Very nice plugin that does the job. We have used this plugin in number of our websites.


Nice plugins that works for free

Fantastic

Works perfect - I loved it


Useless plug-in! They force you to register on their site and you have to pay! But that's not all, you can't delete your account and you can't contact them. They use your personal data to spam you with useless emails. Misleading methods that have nothing to do with Wordpress.org


useless plugin

Class A tool to minify images


Does a good job at optimizing images. 



Full disclosure: I'm leaving this review because I'm sick of seeing the nag in my admin, which I prefer to keep unmolested by the promotional efforts of plugin authors.


Easy to use


I have been using EWWW for 3 years now and never had any issues. So, kudos to that and for this great tool.


My go-to image optimization plugin


WP Core 6.5 has added AVIF support, yet EWWW IO still doesn't support it.  Seems like just an excuse to push people to use their paid CDN service Easy IO.  I've been a long time user of EWWW IO but now it seems like the it doesn't do much of anything useful anymore.  


Failed to keep up with standards, no AVIF support


Very useful for tuning up WordPress site. Thanks for a great plugin!


Very useful and highly functional plugin!


Totally solved page speed issues on premium, it is the oldest plugin for image optimization on WP as far as I know


Great and Simple

Comprehensive image optimization with WebP, AVIF, Lazy Load, and more. Optimize images automatically for Faster Sites and Happy Visitors.

Benjamin Intal

gambitph

<p><strong>Optimize all your images instantly and for free.</strong></p>
<p><a href="https://wpcimo.com/?utm_source=plugin-directory&utm_medium=plugin-page&utm_campaign=readme-txt" rel="nofollow ugc">Cimo</a> is a game-changer for media optimization. It optimizes, resizes, and converts your images instantly as you upload — even before the files are added to your Media Library.</p>
<p><a href="https://wpcimo.com/?utm_source=plugin-directory&utm_medium=plugin-page&utm_campaign=readme-txt" rel="nofollow ugc">Visit Cimo’s website</a> to learn more about how Cimo does things.</p>
<p>From WordPress’ point of view, it’s as if you optimized your image BEFORE your uploaded it. Now, this is next-next-gen image optimization.</p>
<p><a href="https://wpcimo.com/?utm_source=plugin-directory&utm_medium=plugin-page&utm_campaign=readme-txt" rel="nofollow ugc">Cimo</a> works like magic, drag your large image file, and an optimized image will automatically appear in your Media Library. This ensures your website load speed is perfectly optimized by keeping image sizes minimal, without compromising quality.</p>
<ul>
<li>Unlimited usage – upload as many images as you want</li>
<li>Instant optimization – virtually no waiting time</li>
<li>No extra server load</li>
<li>No extra bandwidth</li>
<li>No external image-processing services</li>
</ul>
<blockquote>
<p><strong>Note:</strong> Cimo works in all modern browsers (Chrome, Firefox, Edge, Opera). Image optimization currently doesn’t work in Safari, images would just upload as they normally would, please use any of the browsers listed.</p>
</blockquote>
<p>Image Optimization options:</p>
<ul>
<li><strong>WebP quality</strong> – set the quality level for WebP conversion (1-100), defaults at 80%</li>
<li><strong>Max image dimension</strong> – automatically resize images to a maximum dimension while preserving aspect ratio</li>
<li><strong>WordPress automatic scaling</strong> – disable WordPress’s built-in 2560px image scaling</li>
<li><strong>Thumbnail generation</strong> – disable all WordPress thumbnail generation to save disk space</li>
<li><strong>Individual thumbnail sizes</strong> – selectively enable/disable specific thumbnail sizes</li>
<li><strong>Preset configurations</strong> – one-click “Recommended” settings for optimal performance</li>
<li><strong>Statistics dashboard</strong> – view total storage saved, compression ratio, and optimization metrics</li>
</ul>
<h4>How to use</h4>
<p>Just upload images to your Media Manager as you normally would, then Cimo instantly optimizes the images to the next-gen format WebP on your browser during the upload process, the resulting optimized file is the one saved to your WordPress site. It’s amazing!</p>
<h4>Why use Cimo?</h4>
<ol>
<li><strong>Completely Free & Unlimited</strong> – Image optimization and compression are completely free with no quotas, no limits, and no paywalls. Optimize as many images as you want, forever.</li>
<li><strong>Instant, Lightning-Fast Processing</strong> – Images are optimized instantly in your browser as you upload, with no waiting for server-side or external processing.</li>
<li><strong>Privacy-First</strong> – Your images never leave your device until they’re uploaded to WordPress. No third-party servers, no external processing, complete control over your media.</li>
<li><strong>Zero Server Load</strong> – All optimization happens in your browser, so your website and server stay fast and responsive.</li>
<li><strong>Smart Optimization</strong> – Advanced compression algorithms deliver the best quality-to-size ratio, with automatic WebP conversion for maximum efficiency.</li>
<li><strong>Future-Proof Format</strong> – Automatic WebP conversion ensures your images use the most efficient format, reducing file sizes by up to 80%.</li>
<li><strong>Instant Results</strong> – Experience faster uploads, smaller file sizes, and optimized images that load faster on your website.</li>
<li><strong>Universal Compatibility</strong> – Works seamlessly with the WordPress Block Editor, Elementor, Beaver Builder, and all major page builders.</li>
<li><strong>Developer Friendly</strong> – Clean, lightweight code that won’t interfere with other plugins or slow down your WordPress admin.</li>
</ol>
<h4>Features</h4>
<ul>
<li><strong>Unlimited optimization</strong> – compress and optimize without quotas</li>
<li><strong>WebP conversion</strong> – next‑gen format without external services</li>
<li><strong>Client‑side processing</strong> – faster uploads, no server load</li>
<li><strong>Privacy‑first</strong> – nothing sent to third‑party servers</li>
<li><strong>Lightweight</strong> – no API keys, no background jobs, no server processing</li>
<li><strong>Advanced settings</strong> – full control over quality, dimensions, and thumbnail generation</li>
<li><strong>Statistics dashboard</strong> – track storage savings and optimization performance</li>
<li><strong>Smart presets</strong> – one-click recommended or default configurations</li>
</ul>
<h4>Works with</h4>
<ul>
<li>The native WordPress Block Editor / Gutenberg</li>
<li>Should work with any plugin, but we made sure it works with these:
<ul>
<li>Popular Page Builders
<ul>
<li>Elementor</li>
<li>Divi (partial: dropping files is not yet supported)</li>
<li>Breakdance</li>
<li>Bricks Builder</li>
<li>Oxygen</li>
<li>Beaver Builder</li>
<li>WP Bakery</li>
</ul>
</li>
<li>Popular Block Editor Builders
<ul>
<li>Stackable</li>
<li>Spectra</li>
<li>Kadence</li>
<li>Greenshift</li>
<li>GenerateBlocks</li>
</ul>
</li>
<li>Popular plugins
<ul>
<li>WooCommerce</li>
</ul>
</li>
</ul>
</li>
</ul>
<p><strong>Since Cimo’s optimization works during the upload process, Cimo should be compatible with any plugin that uses images</strong></p>
<h4>What’s in Cimo Premium?</h4>
<p>If you upgrade to <a href="https://wpcimo.com/pricing/?utm_source=plugin-directory&utm_medium=plugin-page&utm_campaign=readme-txt" rel="nofollow ugc">Cimo Premium</a>, you will get the following:</p>
<ul>
<li><strong>Smart Optimization</strong> – uses advanced algorithms to automatically select the optimal compression settings for each image, for the best results without manual tweaking.</li>
<li><strong>Bulk Optimization</strong> – optimize your existing images, videos and audio in your Media Library in one click, no server processing as well</li>
<li><strong>Optimize All Media Uploaded via Form Plugins</strong> – automatically optimize images, videos, and audio uploaded through popular form plugins (Gravity Forms, WPForms, Ninja Forms, Formidable, Fluent Forms, etc.)</li>
<li><strong>Video & Audio Optimization</strong> – automatically optimize and optionally downscale the resolution of videos and audio quality as you upload them</li>
<li><strong>Low Quality Image Placeholders (LQIP)</strong> – for native image blocks, display a subtle image placeholder while waiting for images to load, then fade the loaded image in.</li>
<li><strong>Stealth Mode</strong> – completely hides all Cimo branding and interface elements, while all optimization features continue to work seamlessly in the background.</li>
</ul>
<p><a href="https://wpcimo.com/pricing/?utm_source=plugin-directory&utm_medium=plugin-page&utm_campaign=readme-txt" rel="nofollow ugc">Visit our website</a> to learn more</p>
<p>Video & Audio optimization are also performed as you upload your files, even before the files are added to your Media Library.</p>
<h3>Technical Details</h3>
<ul>
<li><strong>Client-Side Processing</strong>: All optimization happens in the user’s browser</li>
<li><strong>Zero Server Load</strong>: No background processes or server-side optimization</li>
<li><strong>Instant Results</strong>: No waiting for external APIs or server processing</li>
<li><strong>Privacy-First</strong>: Images never leave the user’s device until uploaded</li>
<li><strong>Browser Compatibility</strong>: Works in Chrome, Firefox, Edge, Opera (Safari support not currently available)</li>
</ul>
<h3>Perfect For</h3>
<ul>
<li>Website owners who want to reduce image file sizes without quality loss</li>
<li>Administrators who have content writers who always upload big images without converting them</li>
<li>Designers who always forget to convert images first before uploading to the site</li>
<li>Content creators who upload many images and want faster uploads</li>
<li>Developers building sites that need optimized images for better performance</li>
<li>Agencies managing multiple client sites with image optimization needs</li>
<li>Anyone wanting to convert images to WebP format automatically</li>
<li>Sites where server-side image processing isn’t available or desired</li>
<li>Users who want client-side image optimization for better privacy</li>
<li>Performance-focused websites that need instant image optimization</li>
<li>Developers who want zero server load from image processing</li>
<li>Privacy-conscious users who don’t want images sent to third-party servers</li>
</ul>


Cimo – Free Instant Image Optimizer & WebP Converter


Tried this plugin, and wow, images optimized like magic, no waiting, no server load, no bandwidth, no external services. Unlimited & free, quality intact.


Superb! Works like magic.


Awesome plugin, directly goes to my default install list ! Thank you for the great work !


5 star because we cannot give more

Unlimited free image compression and WebP conversion, done instantly as you upload them. No quotas, no external servers, no limits.

EWWW Image Optimizer vs Cimo – Free Instant Image Optimizer & WebP Converter