Stop WordPress generating thumbnails like 1536x1536 and 2048x2048, see disk space per image size, and delete retired thumbnails. Originals are kept.
Alternatives to Letterbox Thumbnails
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.
Revolutionary auto featured image generator with AI. Effortlessly create thumbnails, force regenerate thumbnails, and automate image workflows.
Presswell Art Directionv2.2.0
Manage focal-point cropping and on-demand custom image generation in WordPress.
Automatically set missing featured images from the first image or a YouTube, Vimeo or Dailymotion video in your content.
Related Posts Thumbnailsv6.0.0
Related Posts by WPBrigade is The Best Customizable plugin, that nicely displays related posts thumbnails under the post.