Local WebP optimizer for WordPress. Free converts images to WebP; Pro adds AVIF and site-wide image tools.
Alternatives to Custom Image Sizes by 99 Robots
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.
Lists every registered image size — built-in and custom add_image_size() sizes — with width, height and crop mode in a Dashboard widget.
Inspect potentially unused media, generated image sizes, and storage usage with a conservative, manual-first workflow.
Scan, repair, and regenerate WordPress thumbnails with missing-file detection, outdated-size checks, resumable processing, and clear local history.
WP Image Sizesv1.2.0
Take control of the image sizes WordPress generates. Pick only the sizes you actually use, per post type, and reclaim wasted server space.
Fix oversized images with zero setup. Automatically creates the image sizes, thumbnails, WebP and AVIF your pages need, in the background.
Regenerate image sizes for all, selected or single images, create only the missing sizes, and clean up leftover size files.
Stop WordPress generating thumbnails like 1536x1536 and 2048x2048, see disk space per image size, and delete retired thumbnails. Originals are kept.
Control which thumbnail sizes WordPress generates, cap oversized uploads, and convert images to WebP — built for shared hosting.
Reinvent Retina Imagesv1.0.3
Sharp retina images in one click: regenerate thumbnails, fix missing image sizes, turn off unneeded ones, make WebP/AVIF and free up space.