Custom Thumbnail Generator manages image sizes via an AJAX interface. It decouples sizes from themes, ensuring they persist and remain functional.
Alternatives to Custom Thumbnail Size On Admin
Plugins below are selected for functional relevance and current directory signals. Active-install counts do not affect this ranking.
Relevant replacements
WordPress plugins with similar use cases
Compatibility and update metadata provide context, not a quality guarantee. Review each plugin’s details for your site.
Thumbnail Editorv2.3.4
Manually Crop and Resize thumbnail images that are uploaded in the Media section.
Local WebP optimizer for WordPress. Free converts images to WebP; Pro adds AVIF and site-wide image tools.
Regenerate thumbnails selectively by upload date and search filters with full history calendar, performance throttle, and fail-safe recovery.
Shows a medium-size image preview near the mouse cursor after hovering media thumbnails in the WordPress Media Library.
Lists every registered image size — built-in and custom add_image_size() sizes — with width, height and crop mode in a Dashboard widget.
ART4ART Thumbnail Doctorv1.0.0
Regenerate thumbnails, identify which theme or plugin declares each size, and review old image sizes with dry-run, quarantine and restore.
Thumbnail Managerv2.3.2
Safely analyze, preview, trash, restore, schedule, regenerate, and manage WordPress thumbnails from a clean tabbed admin screen.
Control which thumbnail sizes WordPress generates, cap oversized uploads, and convert images to WebP — built for shared hosting.
NutsForPress Images and Media is an essential tool for having your images and your meta in perfect order.