CaphLabs

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

RobertWP

RW WebP Converter Lite is a lightweight and easy-to-use WordPress plugin that helps you optimize images by converting JPG and PNG files into the modern WebP format.
The plugin allows you to bulk convert existing images in the media library and automatically convert newly uploaded images to WebP. By reducing image file size while maintaining quality, RW WebP Converter Lite helps improve website loading speed and overall performance.
All features are optional and can be configured from the plugin settings page.
Features: 
* Bulk convert existing JPG and PNG images in the media library to WebP 
* Automatically convert newly uploaded images to WebP 
* Enable or disable automatic conversion via settings 
* Lightweight and fast, with no unnecessary features 
* Compatible with the WordPress media library
Documentation: 
<a href="https://docs.robertwp.com/rw-webp-converter-lite/" rel="nofollow ugc">Plugin Documentation</a> 
Includes setup and usage instructions for this plugin.
<h3>Source Code</h3>
This plugin includes minified JavaScript and CSS files for performance 
and distribution purposes.
The original, human-readable source code for these files is publicly 
available and maintained on GitHub:
https://github.com/robert2021south/rw-webp-converter-lite
The following files are minified in the plugin package: 
– assets/js/rwwcl-admin-bulk.min.js 
– assets/js/rwwcl-admin-deactivate.min.js 
– assets/js/rwwcl-admin-feedback.min.js 
– assets/css/rwwcl-admin-style.min.css 
– assets/css/rwwcl-admin-deactivate-modal.min.css
<h3>Privacy</h3>
This plugin respects your privacy. Any data collected (such as optional feedback or deactivation reasons) is handled transparently and securely.
Feedback Data: When you use the feedback form in the About tab, we collect your rating, feedback message, and optionally your email address. This helps us understand user needs and improve the plugin. 
Deactivation Data: When you uninstall the plugin, you may optionally provide a reason for leaving. This helps us identify areas for improvement.
All data, including any optional email address, is transmitted securely (via TLS/HTTPS) and retained only as long as necessary. For example, feedback data is retained for a maximum of 12 months to help us improve the plugin.
We do not collect any personal data, site URLs, or user-identifiable information without your explicit consent. Email addresses are only collected when voluntarily provided and are never used for marketing.
For complete details on what data is collected, how it is stored (including hashing and encryption for email addresses), the legal basis under GDPR/CCPA, and your rights, please read our full privacy policy: 
https://robertwp.com/privacy-policy

RW WebP Converter Lite

A lightweight WordPress plugin that converts JPG and PNG images to WebP format in bulk and automatically converts newly uploaded images.

OrigiSafe — Advanced Image Optimizer (WebP) — Keep Originals Safe vs RW WebP Converter Lite