內容簡介
Thumbnail Manager 是一款強大的工具，讓您全面掌控 WordPress 的圖片系統。透過此外掛，您可以選擇生成的縮圖尺寸、移除未使用的縮圖，並僅重新生成實際需要的縮圖，保持媒體庫的整潔與優化。
【主要功能】
• 重新生成縮圖，根據當前啟用的尺寸進行
• 安全移除未使用的縮圖
• 偵測孤立的縮圖檔案
• 禁用未來上傳的縮圖尺寸
• 限制操作至特定資料夾
外掛標籤
開發者團隊
原文外掛簡介
Thumbnail Manager helps you control WordPress thumbnail generation, regenerate image sizes, and clean unused thumbnail files from the Media Library.
Use it after changing themes, installing WooCommerce, disabling custom image sizes, or cleaning up years of generated media files. The plugin focuses on predictable thumbnail management: choose which image sizes should stay enabled, rebuild the thumbnails you need, preview cleanup results, then delete only reviewed generated files.
Cleanup is metadata-aware and safety-focused. Thumbnail Manager validates uploads paths, protects original full-size images, runs prune/delete actions in batches, and updates attachment metadata after deleted thumbnail sizes are removed.
Key Features
Regenerate WordPress thumbnails for existing image attachments
Generate only missing thumbnails or force-regenerate all selected images
Disable unwanted registered image sizes for future uploads
Prune unused thumbnails while keeping selected sizes
Run Dry-run previews before deleting generated thumbnail files
Detect legacy thumbnail sizes stored in attachment metadata
Report disk-only orphan matches without deleting unmapped files by default
Scan recommendations based on protected sizes, WooCommerce-related sizes, generated metadata, and common content references
Process large Media Libraries with cursor-based AJAX queues and folder scoping
Manage everything from Tools > Thumbnail Manager
Common Use Cases
Clean WordPress thumbnail bloat after theme or page builder changes
Regenerate thumbnails after changing Media Settings or custom image sizes
Reduce WooCommerce image storage by reviewing generated product thumbnails
Disable image sizes that should no longer be created for new uploads
Rebuild missing thumbnails after migration, restore, or failed image processing
Audit legacy thumbnail sizes left behind by old themes and plugins
Safety First
Thumbnail Manager is designed for controlled cleanup, not blind filesystem deletion.
Original full-size images are not deleted
Delete mode requires a fresh delete token and a completed scan
Dry-run mode never deletes files
Cleanup targets files from attachment metadata
Disk-only orphan matches are reported, not deleted by default
Paths are validated under the WordPress uploads directory before deletion
Attachment metadata is updated after generated thumbnail sizes are removed
What It Does Not Do
It does not compress or optimize image quality
It does not replace image optimization or CDN plugins
It does not automatically delete media without confirmation
It does not delete original uploaded images
It does not unregister image sizes from themes or plugins
Usage
Recommended Workflow
Open Tools > Thumbnail Manager.
Scan Recommendations to review likely keep/remove sizes.
Apply recommended sizes if they match your site.
Open Thumbnail Sizes and save the sizes you want generated for future uploads.
Run Regenerate to rebuild missing or selected thumbnails.
Open Prune Files and run Dry-run before any deletion.
Review matched files, then switch to Delete only when the preview is correct.
Regenerate Thumbnails
Use Regenerate when you need to rebuild WordPress image sizes for existing attachments. You can process all media, the current year, a specific uploads folder, or specific attachment IDs.
Prune Files
Use Prune Files to clean generated thumbnails for sizes you no longer want to keep. Always run Dry-run first. If orphan discovery is enabled, metadata-backed legacy sizes can be included, while unmapped disk-only matches are reported for review.
Thumbnail Sizes
Use Thumbnail Sizes to control which registered image sizes WordPress should generate for future uploads. This setting does not remove existing files until you run Prune Files.
Technical Notes
Uses intermediate_image_sizes_advanced to control future thumbnail generation
Uses cursor-based AJAX queues for regenerate and prune scans
Uses attachment metadata for prune candidates
Validates filesystem paths under the uploads directory before deletion
Updates attachment metadata after generated thumbnail files are removed
Requires the manage_options capability
Works per site on multisite installations
Privacy
Thumbnail Manager does not collect, store, or transmit personal data. All thumbnail scans, regeneration actions, and cleanup actions run locally on your WordPress site.
