Mass Resizer
Mass Resizer allows bulk image resizing, safe WebP conversion, and automatic metadata preservation — improving page speed and optimizing media librari …
5(1 reviews)
·20 active installs·Updated 3 months agoAs of April 2026, Mass Resizer is a WordPress webp plugin with 20 active installations and a 5/5 rating from 1 reviews. It has been downloaded 827 times in total. Requires WordPress 5.0+ and PHP 7.4+. Available on WordPress.org since 2024. Top alternative: EWWW Image Optimizer.
5/51 reviews
20active installs
827total downloads
2 yearssince 2024
Overview
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.
Key Features
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 +…
Screenshots
Ratings & Reviews
51 reviews
5 ★
1
4 ★
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3 ★
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2 ★
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1 ★
0
Compatibility
| WordPress | 5.0+ requiredTested up to 6.9.4 |
| PHP | 7.4+ required |
Top Alternatives to Mass Resizer
Frequently Asked Questions
Changelog
2.10.93 (10.12.2025)
-
Security & safety
– Added strict sanitization for all numeric options.
– Added hard upper limit for image dimensions.
– Improved safe-delete logic (deletes originals only when safe). -
Stability & UX
– Added detailed admin report with full statistics after processing.
– Improved error logging (missing files, unsupported types, editor failures).
– Implemented automatic image/WebP capability detection with clear notices. -
Compatibility
– Improved i18n: translators comments added for all placeholder strings.
– Code refined to meet WordPress.org standards.
– WebP attachments now inherit alt text, caption, and description from the original image.
Contributors
Plugin data sourced from WordPress.org. Analysis and metrics by PluginSift.