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

deadko

TSO Image Master is a complete media management and image optimization plugin for WordPress. It provides the following features from a single admin screen:
Image Optimizer — Convert images to WebP or JPG, set quality and dimensions, replace originals and automatically update all content links. Supports bulk operations. Requires the PHP GD library with WebP support.
Orphaned Image Finder — Detects images in the Media Library that are not referenced in any post, page, widget, meta field, or theme customizer setting. Supports paginated batch scanning to avoid timeouts on large sites.
Rogue File Scanner — Scans the uploads directory for physical files that WordPress does not know about: double-extension files (e.g. image.jpg.webp), plugin backup files, temporary files, and other unregistered images that waste disk space.
SEO & File Names — Edit title, alt text, caption, and description for any image. Rename files using SEO-friendly slugs (lowercase, no accents, hyphens instead of spaces). All internal links are updated automatically.
PDF Compressor — Reduce the file size of PDFs in the Media Library using GhostScript (recommended) or the Imagick PHP extension as a fallback. The original URL never changes.
Auto-Optimizer — Automatically optimize every new image on upload using the configured format and quality. Uses a transient-based mechanism to ensure each image is processed only once and regenerations do not trigger re-optimization.
History — Full audit log of all operations performed by the plugin: optimizations, renames, SEO updates, PDF compressions, and reversions. Filterable by action type, date range, and filename. Configurable automatic cleanup.
URL Fixer — Scans all public content types (posts, pages, and custom post types such as portfolio or slides) for broken image URLs caused by format conversions (e.g. references to .jpg files that have been converted to .webp). Renders blocks and shortcodes when needed so embedded images are detected. Automatically finds the correct replacement and updates the database in one click.
Cache Compatibility — After any operation that modifies file URLs or content, the plugin automatically purges LiteSpeed Cache, WP Rocket, W3 Total Cache, and WP Fastest Cache when they are active.
<h4>Requirements</h4>
<ul>
<li>PHP 7.4 or higher (tested up to 8.3)</li>
<li>WordPress 5.9 or higher (tested up to 7.0)</li>
<li>PHP GD library with JPEG, PNG, GIF, and WebP support</li>
<li>GhostScript (optional, required for PDF compression)</li>
<li>Imagick PHP extension (optional, fallback for PDF compression)</li>
</ul>
<h4>Source Code</h4>
The source code for this plugin is entirely human-readable. The file <code>admin/js/admin.js</code> is unminified, unobfuscated source code. No build tools are required. All translation strings are passed from PHP via <code>wp_localize_script()</code>.
<h4>Translations</h4>
The plugin interface is already translated into the following languages (included in the plugin):
<ul>
<li>English — default</li>
<li>Català (Catalan) — <code>ca</code></li>
<li>Español (Spanish) — <code>es_ES</code></li>
</ul>
Bundled <code>.mo</code> files also translate the plugin name and description on the WordPress Plugins screen when your site language is Catalan or Spanish.
If you would like to contribute a translation into another language, you can do so at <a href="https://translate.wordpress.org/projects/wp-plugins/tso-image-master/" rel="nofollow ugc">translate.wordpress.org</a>.

TSO Image Master

great plugin :)

Complete image optimization suite: convert to WebP/JPG, resize, compress PDFs, find orphans, fix broken URLs.

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