Imagify

Imagify is my preferred image optimization plugin.  I use it when optimizing sites for speed.

It compresses images and creates optimized webp format images to se

It’s made by the same people who created WP Rocket so there is a very tight integration with that plugin.

It has a bulk optimization so you can select all the images you want to optimize and leave this system running while it optimizes all of your images.

When you add new images to your site they are optimized upon upload.

There is an image resize tool so you can reduce the size in pixels which in turn reduces the size of the image in bytes.

There is a free plan which limits how many images you can optimize each month and paid plans of $9.99 per month for unli9mited images or $5.99 per month for 500GB per month of images optimized.