Thumbnail Manager is a powerful tool to take full control over your WordPress image system.

Instead of letting themes and plugins generate dozens of unnecessary thumbnails, you can now:

Control which sizes are created
Remove unused thumbnails safely
Regenerate only what you actually need

All in one place.

🚀 What it does

1. Regenerate Thumbnails (NEW)
– Regenerate thumbnails based on your current enabled sizes
– Works in batches with progress tracking (no timeout issues)
– Perfect after disabling unwanted sizes
– Ensures your Media Library stays consistent and optimized

2. Prune Unused Thumbnails
– Select sizes you want to KEEP
– Automatically detect and remove all other generated thumbnails
– Supports:
– Registered sizes
– Orphan -WxH files
– .webp, .bak, @2x, -1 variants

3. Orphan File Discovery
– Detect leftover thumbnails no longer registered
– Clean legacy sizes from old themes/plugins
– Optional aggressive cleanup mode

4. Disable Sizes for Future Uploads
– Prevent unnecessary thumbnails from being generated
– Reduce storage usage going forward
– Keeps your system lean and predictable

5. Scoped Processing
– Limit operations to specific folders (year/month)
– Safer testing on large Media Libraries

❌ What it does NOT do

It does NOT delete original full-size images
It does NOT modify image quality or compression
It does NOT replace image optimization plugins
It does not automatically run actions without your confirmation

🎯 Who is it for?

WooCommerce stores with heavy image usage
Sites using multiple themes/page builders
Developers cleaning legacy media bloat
Anyone hitting disk limits or slow backups

Features

3-tab UI: Regenerate, Prune Files, Thumbnail Sizes
Batch processing with AJAX (no timeouts)
Dry-run preview before deletion
Smart orphan detection
Progress bars + live feedback
Future upload size control
Multisite compatible (run per site)

Usage

Regenerate (Recommended flow)

Go to Thumbnail Sizes
Disable unwanted sizes
Click Save changes and run regenerate
Let the system rebuild only the sizes you want

Prune Files

Select sizes to KEEP
Run Dry-run first
Review results
Switch to Delete and execute

Thumbnail Sizes

Enable/disable sizes for future uploads
Does NOT affect existing images until prune/regenerate is used

Technical Notes

Uses intermediate_image_sizes_advanced to control generation
Uses AJAX batching to avoid server timeout
Safe file targeting via pattern matching
Requires manage_options capability

Privacy

This plugin does not collect or transmit any personal data.
All operations are performed locally on your server.