All-in-one WordPress image optimization: disable thumbnails, compress, convert to WebP & AVIF, clean your media library, and offload images to a CDN.
Alternatives to Isizer – image size manager
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.
Simple Image Sizesv3.2.6
This plugin lets you create custom image sizes for your site. Override your theme sizes directly on the Media settings page, regenerate thumbnails, an …
Local WebP optimizer for WordPress. Free converts images to WebP; Pro adds AVIF and site-wide image tools.
Speed up your website. Optimize your JPEG, PNG, and WebP images automatically with TinyPNG.
Custom Thumbnail Generator manages image sizes via an AJAX interface. It decouples sizes from themes, ensuring they persist and remain functional.
Add featured images to WordPress RSS feeds for Mailchimp newsletters and RSS readers. Includes image sizes and optional enclosure tags.
Modern role editor, multiple roles, content control and smart role rules for WordPress.
Scan, repair, and regenerate WordPress thumbnails with missing-file detection, outdated-size checks, resumable processing, and clear local history.
Manual Image Cropv1.15
Plugin allows you to manually crop all the image sizes registered in your WordPress theme (in particular featured image).
Hide and manage external download and redirect URLs behind customizable buttons and a clean titanium.download endpoint.