Title: Mass Resizer Author: Stan Furtovsky Published: December 30, 2024 Last modified: December 10, 2025 --- Search plugins ![](https://ps.w.org/mass-resizer/assets/banner-772x250.jpg?rev=3214913) ![](https://ps.w.org/mass-resizer/assets/icon-256x256.jpg?rev=3214945) # Mass Resizer By [Stan Furtovsky](https://profiles.wordpress.org/konion/) [Download](https://downloads.wordpress.org/plugin/mass-resizer.2.10.93.zip) * [Details](https://pcd.wordpress.org/plugins/mass-resizer/#description) * [Reviews](https://pcd.wordpress.org/plugins/mass-resizer/#reviews) * [Installation](https://pcd.wordpress.org/plugins/mass-resizer/#installation) * [Development](https://pcd.wordpress.org/plugins/mass-resizer/#developers) [Support](https://wordpress.org/support/plugin/mass-resizer/) ## Description 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 + 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. ## Screenshots * [[ * Mass Resizer settings page. ## Installation 1. Upload the `mass-resizer` folder to `/wp-content/plugins/`. 2. Activate the plugin via **Plugins Installed Plugins**. 3. Open **Mass Resizer** in the WordPress dashboard and configure your desired options. 4. Use the Media Library bulk actions to process selected images. ## FAQ ### Does the plugin delete my original images? Only when both features are enabled: • “Replace old images” • “Delete original images” Otherwise, deletion is blocked to prevent broken pages. ### Will my SEO metadata be preserved? Yes. WebP attachments automatically inherit: • alt text • caption • description• parent relation • date fields ### Does Mass Resizer modify existing posts? If “Replace old images” is enabled, the plugin updates posts/pages that contain the converted images. Otherwise, no post content is changed. ### Can I use it on a large site? Yes. The plugin is optimized to handle large numbers of images, and includes safety checks, capability detection, and detailed logging. ## Reviews ![](https://secure.gravatar.com/avatar/dfc12d1181f434f4a4c5589b5cd0a03cf5d2a99bd4b353e4278497b6bdd9a573? s=60&d=retro&r=g) ### 󠀁[Best plugin ever](https://wordpress.org/support/topic/best-plugin-ever-507/)󠁿 [bimbozvon](https://profiles.wordpress.org/bimbozvon/) March 5, 2025 Thanks to the developer, I’ve been looking for a planner with this kind of functionality and ease of use for a long time! [ Read all 1 review ](https://wordpress.org/support/plugin/mass-resizer/reviews/) ## Contributors & Developers “Mass Resizer” is open source software. The following people have contributed to this plugin. Contributors * [ Stan Furtovsky ](https://profiles.wordpress.org/konion/) “Mass Resizer” has been translated into 1 locale. Thank you to [the translators](https://translate.wordpress.org/projects/wp-plugins/mass-resizer/contributors) for their contributions. [Translate “Mass Resizer” into your language.](https://translate.wordpress.org/projects/wp-plugins/mass-resizer) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/mass-resizer/), check out the [SVN repository](https://plugins.svn.wordpress.org/mass-resizer/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/mass-resizer/) by [RSS](https://plugins.trac.wordpress.org/log/mass-resizer/?limit=100&mode=stop_on_copy&format=rss). ## 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. #### 2.9.207 (29.12.2024) * Security improvements and minor fixes. #### 2.9.201 (11.11.2024) * Added support for replacing featured images. * General optimization and bug fixes. #### 2.9.200 (10.11.2024) * Added multilingual interface (RU/EN). * Introduced logging system with admin notices. * UI improvements and better compatibility with WordPress themes. ## Meta * Version **2.10.93** * Last updated **4 months ago** * Active installations **20+** * WordPress version ** 5.0 or higher ** * Tested up to **6.9.4** * PHP version ** 7.4 or higher ** * Languages * [English (US)](https://wordpress.org/plugins/mass-resizer/) and [Russian](https://ru.wordpress.org/plugins/mass-resizer/). * [Translate into your language](https://translate.wordpress.org/projects/wp-plugins/mass-resizer) * Tags * [image compression](https://pcd.wordpress.org/plugins/tags/image-compression/) [image resize](https://pcd.wordpress.org/plugins/tags/image-resize/)[media](https://pcd.wordpress.org/plugins/tags/media/) [webp](https://pcd.wordpress.org/plugins/tags/webp/) * [Advanced View](https://pcd.wordpress.org/plugins/mass-resizer/advanced/) ## Ratings 5 out of 5 stars. * [ 1 5-star review ](https://wordpress.org/support/plugin/mass-resizer/reviews/?filter=5) * [ 0 4-star reviews ](https://wordpress.org/support/plugin/mass-resizer/reviews/?filter=4) * [ 0 3-star reviews ](https://wordpress.org/support/plugin/mass-resizer/reviews/?filter=3) * [ 0 2-star reviews ](https://wordpress.org/support/plugin/mass-resizer/reviews/?filter=2) * [ 0 1-star reviews ](https://wordpress.org/support/plugin/mass-resizer/reviews/?filter=1) [Add my review](https://wordpress.org/support/plugin/mass-resizer/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/mass-resizer/reviews/) ## Contributors * [ Stan Furtovsky ](https://profiles.wordpress.org/konion/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/mass-resizer/)