Convert images to WebP and replace originals—no duplicates. Save storage and speed up your site. Auto-convert on upload & bulk tools (premium).

Nazmul Ahsan

Codexpert, Inc

Pluggable IO

ThumbPress

ThumbPress – Image Management Suite for Performance and Optimization

Disable Thumbnails, Regenerate Thumbnails, Compress Images, Convert to WebP, Find Unused and Large Images, Edit Images, and more with ThumbPress.

Core Essentials

WebP Image Converter & Replacer converts your images (JPEG, PNG, static GIF) to WebP, replaces originals only when smaller, and updates database references so your site transparently serves <code>.webp</code>. No duplicate files. No front-end bloat. Just faster pages and less disk usage.
Why this plugin 
– No Duplicate Images: Converts and replaces originals when WebP is smaller, keeping <code>/uploads</code> lean. 
– Real Performance Gains: WebP typically reduces size ~25–35% at similar quality, aiding Core Web Vitals. 
– Safety First: Never deletes the original unless conversion succeeds and the WebP is smaller. 
– Full DB Integration: All generated sizes are converted; URLs in content/meta are updated to <code>.webp</code>. 
– On-Server Only: Uses PHP GD or Imagick. No external API, keys, or privacy concerns. 
– Lightweight: Runs only during conversion—nothing extra on the front end.
Free features 
– Convert individual images from Media → Library (list view). 
– Optimization Overview with counts: convertible, converted, remaining, skipped, failed, total space saved. 
– Smart memory handling to avoid PHP exhaustion on large images.
Premium features 
– Auto-convert on upload: New images become WebP automatically. 
– Bulk convert selected: Multi-select in Media Library (list view). 
– Bulk convert all: Library-wide conversion with progress + pause/resume.
<blockquote>
Whether you’re tight on storage or chasing better performance, this is a safe, effective way to modernize images.
</blockquote>
IMPORTANT: Because originals may be deleted, back up your <code>/wp-content/uploads/</code> and database before converting. Test on staging if possible.
<h3>How it works</h3>
<ol>
<li>Plugin checks server support (GD/Imagick with WebP).</li>
<li>You convert images (single/bulk/premium auto).</li>
<li>If the <code>.webp</code> is smaller, the original file is removed and all DB refs switch to <code>.webp</code>.</li>
<li>Your site now serves WebP transparently—no theme changes required.</li>
</ol>
<h3>Usage</h3>
Optimization Overview 
– Settings → Media → “WebP Image Converter & Replacer” 
– See totals converted/remaining/skipped/failed and space saved.
Convert individual images 
– Media → Library (list view) → Convert to WebP link under each item.
Premium 
– Auto-convert on upload: toggle under Settings → Media. 
– Bulk convert selected: select items in Media Library (list view) → bulk action Convert to WebP. 
– Bulk convert all: Start Bulk Optimization with progress + pause/resume.
After conversion 
– Verify pages serve <code>.webp</code> in browser dev tools. 
– Clear any caches/CDN.
<h3>Phoenix Media Rename Integration</h3>
We integrate with <a href="https://en-gb.wordpress.org/plugins/phoenix-media-rename/" rel="nofollow ugc">Phoenix Media Rename</a> to safely update all database references.
Why Phoenix? 
– Mature, reliable database URL updates across posts, custom fields, widgets, Customizer, etc. 
– Reduces risk vs. “DIY” find/replace logic used by other optimizers. 
– Lets this plugin focus on conversion while Phoenix handles DB updates.
Flow 
1. Convert to WebP. 
2. Phoenix updates URLs from <code>.jpg/.png/.gif</code> to <code>.webp</code>. 
3. Your site serves WebP with no broken links.

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