CaphLabs

<p>Keep Originals Safe, convert JPEG/PNG images to WebP and makes WebP the canonical file. WP returns <code>.webp</code> URLs, Keeping originals safely archived.</p>
<h3>How it works (high level)</h3>
<ol>
<li>
<p><strong>Convert</strong></p>
<ul>
<li>For a JPG/PNG attachment, the plugin generates a WebP for the full image and all WordPress-generated sizes.</li>
<li>Conversion is done through WordPress’ image editor system (<strong>WP_Image_Editor</strong>), meaning it uses <strong>GD</strong> or <strong>Imagick</strong> (whichever your server supports) with WebP support enabled.</li>
</ul>
</li>
<li>
<p><strong>Move originals</strong></p>
<ul>
<li>The original JPG/PNG files are moved to:
<ul>
<li><code>wp-content/uploads/_originals/...</code></li>
</ul>
</li>
<li>The folder structure mirrors your uploads structure.</li>
</ul>
</li>
<li>
<p><strong>Update WordPress to serve WebP</strong></p>
<ul>
<li>Attachment “file” + metadata are updated so WordPress serves <code>.webp</code> as the attachment file.</li>
<li>Attachment mime type is updated to <code>image/webp</code>.</li>
</ul>
</li>
<li>
<p><strong>Optional: Replace old URLs everywhere</strong></p>
<ul>
<li>If enabled, the plugin can replace old <code>.jpg/.png</code> URLs across:
<ul>
<li>post content</li>
<li>postmeta</li>
</ul>
</li>
<li>Replacement is <strong>serialized-safe</strong> (does not break serialized arrays).</li>
</ul>
</li>
</ol>
<h3>Background jobs (keeps running after page reload)</h3>
<p>Conversion/repair/sweep jobs are designed to run in the background. They keep ticking even if you refresh the page or close the tab.</p>
<p>The plugin uses multiple loopback methods (admin-post / REST / public tick fallback) so it can keep working even on restrictive hosting setups.</p>
<h3>Log + “it looks frozen” note</h3>
<p>A rolling “terminal style” log is written to:<br />
– <code>wp-content/uploads/hsbc-webp-only/logs/webp-only.log</code></p>
<p>If the log appears to freeze in the admin page:<br />
– click <strong>Refresh Log</strong>, or<br />
– refresh the page</p>
<p>The job may still be running server-side; refreshing the log/page usually catches up.</p>
<h3>Usage</h3>
<p>Go to <strong>Media <span aria-hidden="true" class="wp-exclude-emoji">→</span> WebP Only</strong>.</p>
<h3>Settings</h3>
<ul>
<li><strong>Quality</strong>
<ul>
<li>WebP quality for conversion (0–100).</li>
</ul>
</li>
<li><strong>Batch size</strong>
<ul>
<li>How many items to process per tick. Smaller batches reduce server load.</li>
</ul>
</li>
<li><strong>Replace old .jpg/.png URLs across content + postmeta (serialized-safe)</strong>
<ul>
<li>Recommended if your site content contains hard-coded image URLs.</li>
</ul>
</li>
<li><strong>Sweep Include / Exclude</strong>
<ul>
<li>Used by the Sweep tools to control which folders are scanned.</li>
</ul>
</li>
</ul>
<h3>Conversion Jobs (buttons)</h3>
<p><strong>Start Bulk Convert</strong><br />
– Converts Media Library attachments (JPG/PNG) in batches.<br />
– Moves originals to <code>uploads/_originals/</code>.<br />
– Updates attachment metadata so WordPress serves <code>.webp</code>.<br />
– Optional URL replacement (content + postmeta).</p>
<p><strong>Start Repair/Cleanup</strong><br />
– Repairs inconsistencies if something was partially converted or moved.<br />
– Useful after restores/migrations or if some attachments have mismatched metadata.<br />
– Optional URL replacement.</p>
<p><strong>Start Folder Sweep</strong><br />
– Scans the filesystem for eligible images (based on your Sweep Include/Exclude rules).<br />
– Designed for sites with additional image folders beyond standard uploads.<br />
– Optional URL replacement.</p>
<p><strong>Stop Job</strong><br />
– Stops the currently running job.</p>
<h3>Maintenance / Cleanup (buttons)</h3>
<p><strong>Delete duplicate _originals</strong><br />
– Deletes backup files in <code>uploads/_originals/</code> *only when* an identical file already exists in <code>uploads/</code>.<br />
– This is a cleanup tool for situations where originals were restored back into uploads and you no longer need the archived duplicate.</p>
<p><strong>Delete duplicate _webp</strong><br />
– Removes orphaned WebP cache files in:<br />
  – <code>uploads/_webp/</code><br />
– Only deletes WebP files that no longer match anything in <code>uploads/</code> or <code>uploads/_originals/</code>.</p>
<p><strong>Delete duplicate sweep _originals</strong><br />
– Maintenance cleanup for <strong>non-uploads</strong> roots (folders under <code>wp-content/</code>) that contain their own <code>_originals/</code> folders.<br />
– It uses your <strong>Sweep Include</strong> list to find those roots.<br />
– Only deletes a file from <code><root>/_originals/</code> when the same file exists at <code><root>/</code> AND the file size matches (safe duplicate).</p>
<p><strong>Revert Everything</strong><br />
– Restores original JPG/PNG files from <code>uploads/_originals/</code> back into <code>uploads/</code>.<br />
– Reverts attachment metadata so WordPress serves the originals again.</p>
<h3>Log controls</h3>
<p><strong>Refresh Log</strong><br />
– Pulls the latest log tail into the admin screen.</p>
<p><strong>Reset Log</strong><br />
– Clears the log file.</p>
<h3>Requirements</h3>
<ul>
<li>WordPress’ image editor must support WebP.
<ul>
<li><strong>GD</strong> with WebP support, or</li>
<li><strong>Imagick</strong> with WebP support</li>
</ul>
</li>
<li>If WebP conversion is not supported on your server, conversion/repair/sweep will refuse to run (revert tools can still work).</li>
</ul>


OrigiSafe — Advanced Image Optimizer (WebP) — Keep Originals Safe

Convert JPG/PNG uploads (and existing library) to WebP, move originals to /uploads/_originals/, and update Media Library metadata - WP serves .webp

nosilver4u

<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>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 that doesn't require a rocket science degree. Optimize images automatically for Faster Sites and Happy Visitors.

OrigiSafe — Advanced Image Optimizer (WebP) — Keep Originals Safe vs EWWW Image Optimizer