Mass Resizer allows bulk image resizing, safe WebP conversion, and automatic metadata preservation — improving page speed and optimizing media librari …

Stan Furtovsky

Mass Resizer is a lightweight but powerful plugin for bulk image optimization. 
It resizes large images, converts them to WebP, replaces them across posts/pages, and safely manages media files without risking broken content.
<h3>Key Features</h3>
Bulk Image Resize 
• Automatically resizes images to a maximum width/height 
• Maintains aspect ratio (no cropping, unless enabled) 
• Skips small images to reduce unnecessary processing
Safe WebP Conversion 
• Converts JPEG/PNG to modern WebP format 
• Inherits original image metadata (alt, caption, description) 
• Creates proper attachment entries with parent relations 
• Preserves titles and SEO attributes
Safe Replace Mode 
• Replaces all occurrences of images in posts and pages 
• Updates featured images as well 
• Multiple registered sizes are replaced (full + intermediate sizes)
Safe Delete Mode 
To prevent content breakage, original images are deleted only when both conditions are met: 
1. Replace Old Images = enabled 
2. Crop = disabled 
If delete was requested in unsafe configuration, the plugin logs a warning and ignores the deletion.
Admin Statistics + Logs 
After each run, the plugin displays a detailed summary: 
• Images cropped 
• Images converted to WebP 
• Pages updated 
• Originals deleted 
• Total completed operations
All warnings (missing files, unsupported types, editor errors) are logged and shown to the administrator.
Automatic Server Capability Detection 
The plugin checks whether your server supports: 
• JPEG editing 
• WebP conversion
Unsupported features are automatically disabled with an explanation.
Fully Internationalized (i18n) 
All dynamic strings include translator comments, following WordPress.org standards.

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