Thumbnail Manager
Safely analyze, preview, trash, restore, schedule, regenerate, and manage WordPress thumbnails from a clean tabbed admin screen.
Use with caution
Thumbnail Manager works, but test it on a staging site before relying on it in 2026. It runs on 100+ sites and was last updated 3 months ago, and scores 53/100 on our health check.
- Small user base (100+ active installs)
- Very few reviews so far
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Thumbnail Manager stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| cleanup | >100 |
| image optimization | >100 |
| media management | >100 |
| regenerate thumbnails | #22 |
| thumbnails | #42 |
Version adoption
Share of active sites per release.
About Thumbnail Manager
From the official readme · v2.3.2Description
Thumbnail Manager is a safer and more complete media-maintenance workflow for WordPress.
Instead of deleting thumbnails blindly, the plugin now helps you:
- Preview cleanup results before removing files
- Work from focused WordPress-style tabs for Analysis, Sizes, Cleanup, Optimize, Backup, Reports, and Pro previews
- Move thumbnails to plugin Trash instead of deleting permanently
- Create a zip backup of the exact matching thumbnails before moving them to Trash
- Restore trashed thumbnails later if needed
- Process large libraries in batches with visible progress
- Detect orphan thumbnails left behind on disk
- Detect probably unused media items across post content, featured images, and common builder data
- Regenerate missing image sizes in batches
- Review per-size analytics including file counts, storage usage, missing sizes, and orphan counts
- Review recent activity logs and reporting summaries for cleanup, restore, backup, and regeneration workflows
- Disable selected image sizes for future uploads
- Create zip backups for all uploads or a specific year/month folder
- Schedule recurring cleanup runs with configurable frequency, size scope, and folder scope
This release is built for site owners, developers, agencies, and anyone trying to reduce thumbnail bloat without risking accidental data loss.
Features
- Dry run / preview before cleanup
- WordPress-style tabbed admin screen with persistent support and ad sidebar
- Trash and Restore workflow for safer deletion
- Optional zip backup before moving matching thumbnails to Trash
- Batch processing with real progress for scan, cleanup, and regeneration
- Unused media detection
- Orphan thumbnail detection
- Regenerate missing sizes
- Per-size analytics dashboard
- Reporting and recent activity logs
- Advanced filters for image format, usage status, and orphan-only cleanup
- WebP variant generation for JPEG and PNG uploads
- Media Library thumbnail summary column with per-image quick actions
- Custom image size manager with visual previews
- Bulk image optimization with TinyPNG-compatible API support
- Size usage analysis based on content and stored meta references
- Image size disable controls for future uploads
- Media backup export to zip
- Scheduled cleanup powered by WP-Cron
Custom Size Manager
Create, update, and remove custom image sizes directly from the plugin screen. The manager includes a simple visual preview so you can sanity-check new dimensions before you save them for future uploads.
Tabbed Admin Screen
The Thumbnail Manager screen is organized into focused tabs for Analysis, Sizes, Cleanup, Optimize, Backup, Reports, and Pro previews. The support and ad sidebar remains visible while moving between tabs.
External Services
The free version of Thumbnail Manager displays a Google AdSense support ad in its WordPress admin screen sidebar.
The admin screen loads Google’s AdSense script from https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js with the publisher client ca-pub-9076174896803444 and ad slot 9828772606. Google may process ad requests, impressions, browser data, cookies, and related signals according to its own policies.
Google AdSense is provided by Google LLC.
Terms: https://policies.google.com/terms
Privacy Policy: https://policies.google.com/privacy
AdSense policies: https://support.google.com/adsense/answer/48182
Installation
- Upload the plugin files to the
/wp-content/plugins/thumbnail-removerdirectory, or install the plugin through the WordPress plugins screen directly. - Activate the plugin through the
Pluginsscreen in WordPress. - Go to
Tools > Thumbnail Manager. - Use the Analysis tab before your first cleanup so you can review thumbnail usage, orphan counts, and unused media signals.
- Configure scheduled cleanup from the Cleanup tab if you want recurring maintenance.
Frequently asked questions
Does the plugin permanently delete thumbnails?
Not during cleanup. Thumbnail Manager moves matching thumbnail files into plugin Trash first so they can be restored later. To free disk space permanently, use Delete Permanently for one trash batch or Empty Trash for all batches in the Trash and Restore table.
What does Preview do?
Preview performs a dry run and shows how many files match your current selection, which sizes are involved, how much space can be recovered, and how many orphan thumbnails were found.
What are orphan thumbnails?
Orphan thumbnails are files such as image-300x300.jpg that still exist on disk but are no longer tracked in WordPress attachment metadata.
How does unused media detection work?
The plugin scans image attachments and checks for usage in featured images, parent attachments, post content, and stored builder/meta content. The results are best treated as “probably unused” so you can review them manually.
Can I disable image sizes for future uploads without deleting old files?
Yes. The size-disable settings prevent selected image sizes from being generated for future uploads only. Existing thumbnails are not removed unless you explicitly preview and move them to Trash.
Can I regenerate missing sizes after enabling a size again?
Yes. Use the Regenerate Missing Sizes section to rebuild missing image sizes in batches, switch to a full rebuild mode when needed, or use Media Library bulk actions for selected images.
Can I limit cleanup to only orphan thumbnails or probably unused media?
Yes. The advanced filters can narrow analysis, cleanup, and regeneration jobs by image format, attachment usage status, and whether the thumbnail files are metadata-tracked or orphaned.
Can the plugin generate WebP copies for existing media?
Yes. The WebP generation tool can create .webp copies for JPEG and PNG originals plus their registered thumbnail sizes when your WordPress image editor supports WebP output.
Can the plugin bulk-optimize images without deleting them?
Yes. You can connect a TinyPNG API key and run bulk optimization against original uploads, generated thumbnails, or both while keeping the files in place.
Is the plugin suitable for larger media libraries?
Yes. Analysis, cleanup, and regeneration are processed in batches with visible progress to reduce timeout problems on larger WordPress sites.
Can I back up my files before cleanup?
Yes. You can create a zip backup for all uploads or for a selected year/month folder, and cleanup can also create a zip backup of the exact matching thumbnails before they are moved to plugin Trash.
Can I restore only one cleanup batch instead of everything?
Yes. Each cleanup run creates its own Trash batch, so you can restore a specific batch independently.
How do I empty the plugin Trash?
Use Empty Trash in the Trash and Restore table to remove every batch, or use Delete Permanently for a single batch. This deletes the stored trash files and any backup stored with those batches, and it cannot be undone.
Does scheduled cleanup delete files permanently?
No. Scheduled cleanup uses the same plugin Trash flow as manual cleanup, so matching thumbnails can still be restored later.
What is included in Reporting and Logs?
The reporting section shows recent analysis, preview, cleanup, restore, regeneration, backup, and scheduled cleanup activity along with summary totals for recovered storage and other media operations.
Does the plugin detect thumbnails that exist on disk but not in metadata?
Yes. That is exactly what orphan thumbnail detection is for. These files are included in analysis and preview results so you can decide whether to move them to Trash.
Should I trust unused media results as a final delete list?
No. The plugin marks items as probably unused based on several WordPress relationships and content checks, but you should still review those results manually before broader media cleanup decisions.
Changelog
This update adds persistent reporting and recent activity logs for media operations in the admin screen.
2.3.2
- Fixed Plugin Check annotations for WordPress 5.0 compatibility, nonce handling, translator comments, and prepared SQL checks
- Added a cache-safe version to the AdSense admin script enqueue
- Updated the GitHub Pages workflow to publish all seven tab screenshots
2.3.1
- Refreshed the admin screen with WordPress-style tabs across Analysis, Sizes, Cleanup, Optimize, Backup, Reports, and Pro
- Updated all plugin screenshots so each admin tab has its own WordPress.org screenshot
- Added the free-version Google AdSense support ad placement in the admin sidebar
- Updated plugin docs, readme copy, and release tooling for the new tabbed screenshot set
2.3.0
- Confirmed compatibility metadata for WordPress 7.0 while keeping the PHP requirement at 7.4 or newer.
- Added a Media Library column showing thumbnail totals, storage, orphan counts, and missing-size hints per image
- Added Media Library quick actions to move one image’s thumbnails to Trash or regenerate missing sizes
- Added a custom size manager for registering, editing, and removing custom image sizes with visual previews
- Added TinyPNG-compatible bulk optimization for originals and generated thumbnails
- Added size-usage analysis so the analytics table reports which thumbnail sizes appear in content and meta references
- Expanded thumbnail regeneration with missing-only vs full rebuild modes and Media Library bulk actions
- Added batch WebP generation for JPEG and PNG originals plus registered thumbnail sizes
- Added WebP generation controls for include-original and overwrite-existing behavior
- Logged WebP generation runs in the Reporting and Logs section
- Added permanent delete actions for individual Trash batches and for emptying all plugin Trash.
- Added optional zip backups for matching thumbnails before they are moved to plugin Trash
- Stored cleanup backup links with Trash batches so previous cleanup backups remain downloadable from the Trash and Restore table
- Organized the admin screen into WordPress-style tabs while keeping the support and ad sidebar visible
- Added advanced filters for image format, attachment usage, and orphan-only versus tracked cleanup
- Reused the new filters across analysis, preview cleanup, and regeneration workflows
- Updated the admin UI and documentation to explain the extra filtering controls
2.2.0
- Added a Reporting and Logs section with recent activity history
- Added summary cards for recovered storage, restored files, regenerated sizes, and backup runs
- Logged manual operations and scheduled cleanup events in a bounded admin-visible activity history
2.1.0
- Added WP-Cron scheduled cleanup with daily, weekly, and monthly frequency options
- Added scheduled cleanup scope controls for image sizes and upload folders
- Added scheduled cleanup status, next-run visibility, and last-result summaries in the admin UI
- Kept scheduled cleanup on the same Trash and Restore workflow as manual cleanup
2.0.0
- Added dry-run preview before cleanup
- Added Trash and Restore workflow for thumbnail removal
- Added batch processing with progress for analysis, cleanup, and regeneration
- Added orphan thumbnail detection
- Added probably unused media detection
- Added missing-size regeneration workflow
- Added per-size analytics dashboard
- Refreshed admin UI for the safer cleanup workflow
- Updated plugin description and documentation
Screenshots
For developers
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FAQ
Thumbnail Manager: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 5, 2026
Is Thumbnail Manager free?
Yes. Thumbnail Manager is free to download and use from the official WordPress.org plugin directory.
Is Thumbnail Manager safe to use in 2026?
Thumbnail Manager works, but test it on a staging site before relying on it in 2026. It runs on 100+ sites and was last updated 3 months ago, and scores 53/100 on our health check.
How many websites use Thumbnail Manager?
Thumbnail Manager is active on 100+ WordPress websites and has been downloaded 2,663 times since it launched in September 2024. It was downloaded 137 times in the last 30 days.
Does Thumbnail Manager work with WordPress 7.1?
Thumbnail Manager is officially tested up to WordPress 7.0.6, while the latest release is 7.1.2. It may still work, but try it on a staging site first.
What PHP version does Thumbnail Manager need?
Thumbnail Manager requires PHP 7.4 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was Thumbnail Manager last updated?
The latest version, 2.3.2, was released on July 5, 2026 (3 months ago).
Who makes Thumbnail Manager?
Thumbnail Manager is developed and maintained by Mehdi Rezaei.
What are the best alternatives to Thumbnail Manager?
The most popular alternatives to Thumbnail Manager are WP-Sweep (100K+ installs), Simple Revisions Delete (10K+ installs) and Delete Duplicate Posts (10K+ installs).
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