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

KeyCDN

<h4>WordPress Image Optimizer</h4>
<p>Optimus reduces the file size of uploaded media files automatically. Depending on the image and format, reductions in size of up to 70% are possible. Several kilobytes can be saved per image—these savings contribute positively to the performance of the blog website. What’s most impressive about the compression technology: the quality of the images is maintained.</p>
<blockquote>
<h4>There are three different versions of Optimus:</h4>
<ol>
<li><strong>Optimus</strong> <em>(Free)</em> as base version with limitations (e.g. max of 100kb)</li>
<li><strong>Optimus HQ</strong> <em>(Premium)</em> with expanded functionality for personal projects</li>
<li><strong>Optimus HQ PRO</strong> <em>(Premium)</em> as professional solution for customer websites</li>
</ol>
</blockquote>
<p>More details about the features and the pricing model on <a href="https://optimus.io" rel="nofollow ugc">optimus.io</a></p>
<h4>How does it work?</h4>
<p>During the uploading process of images to the media library, the <em>Optimus</em> plugin simultaneously sends the images to the <em>Optimus</em> server, where the incoming material is processed and sent back in optimized form. Afterwards, the <em>Optimus</em> plugin saves the image version with a reduced file size in the media library.</p>
<p>The optimization of images – <em>including thumbnails</em> – is conducted in the background and outside of the view of the user. The image compression gains per file are displayed by Optimus within the media library in form of a percentage value, see <a href="https://wordpress.org/plugins/optimus/screenshots/" rel="ugc">screenshot</a>.</p>
<p>Superfluous information that is saved by image processing programs and is not even necessary for displaying the image is extracted from image files. This way, the quality of the graphics remains intact while the image size can be reduced significantly. If you wish, Optimus keeps all author, EXIF and copyright information contained within the photos — the compressional gains will be correspondingly lower.</p>
<p>Optimus supports the conversion of images to the new <a href="https://www.keycdn.com/blog/convert-to-webp-the-successor-of-jpeg" rel="nofollow ugc"><em>WebP</em> image format</a>.</p>
<blockquote>
<p>It is recommended to use the <a href="https://wordpress.org/plugins/cache-enabler/" rel="ugc">WordPress Cache Enabler</a> plugin to integrate the converted WebP images.</p>
</blockquote>
<h4>Features</h4>
<ul>
<li><a href="https://www.keycdn.com/support/optimus/progressive-jpeg" rel="nofollow ugc">Progressive JPEGs</a></li>
<li>Reduction of file size during the upload</li>
<li>Optimization of all preview images of a photo</li>
<li>No adjustments to code necessary</li>
<li>Optional: no removal of EXIF and IPTC metadata</li>
<li>Optional: HTTPS connection for the image transfer (Optimus HQ)</li>
<li>Optional: <a href="https://www.keycdn.com/support/optimus/configuration-to-deliver-webp" rel="nofollow ugc">conversion to the WebP</a> image format (Optimus HQ)</li>
<li>Faster load times for blog pages</li>
<li>Support for WooCommerce</li>
<li>WordPress multisite-support</li>
<li><a href="https://www.keycdn.com/support/optimus/image-bulk-optimization" rel="nofollow ugc">Bulk optimization</a> (optimize existing images)</li>
</ul>
<h4>Privacy</h4>
<ul>
<li>After the image optimization and transfer process, the <em>Optimus</em> server immediately deletes all the temporarily stored files. No files are stored!</li>
<li>The Optimus servers are located in Germany.</li>
</ul>
<h4>Tips</h4>
<ul>
<li>Photos should always be saved as JPEGs rather than PNGs. The PNG format works well for illustrations, JPEG on the other hand is the right choice for photographs. Another reason: the size reduction always works more quickly for JPEGs.</li>
<li>Your images have been optimized using Desktop tools such as ImageOptim (Mac) or PNGGauntlet (Win) before you upload them? Optimus has the significant benefit of also minimizing the thumbnails (=preview images) created by WordPress. After all, themes almost always integrate thumbnails rather than original images.</li>
</ul>
<h4>System Requirements</h4>
<ul>
<li>PHP >=5.6</li>
<li>WordPress >=4.6</li>
<li>Allow outbound connections</li>
</ul>
<h4>Storage Utilization</h4>
<ul>
<li>Backend: ~ 0,19 MB</li>
<li>Frontend: ~ 0,01 MB</li>
</ul>
<h4>Website</h4>
<ul>
<li><a href="https://optimus.io" rel="nofollow ugc">optimus.io</a></li>
</ul>
<h4>Author</h4>
<ul>
<li><a href="https://www.keycdn.com" title="KeyCDN" rel="nofollow ugc">KeyCDN</a></li>
</ul>


Optimus – WordPress Image Optimizer

Effective image compression and optimization during the upload process. Smart, automatic and reliable.

OrigiSafe — Advanced Image Optimizer (WebP) — Keep Originals Safe vs Optimus – WordPress Image Optimizer