Kama Thumbnail Pro

Creates image thumbnails on the fly without overloading the server.

The best alternative to scripts like "thumbnail.php".

Supports multisite.

This is the premium version of the plugin https://wp-kama.ru/plugin/kama-thumbnail

Differences so far:

• Full WEBP support.
• Auto-generation of thumbnails for embedded videos from YouTube.
• In development: auto-optimization of generated thumbnails.
• In development: applying watermarks to generated thumbnails.