Plugin to resize images on WordPress? Free?

re-smush 100% free

You can try Smush or ShortPixel

You can use the free "ShortPixel Image Optimizer" plugin for WordPress to automatically resize and compress your large WebP images to your desired dimensions like 1024 or 640 pixels. It's an effective solution for optimizing images without compromising quality. It also helps to improve your website's loading speed and performance.