frontend or backend to compress images?

I am facing a long delay problem in my website, and one of the reasons is large images.

I know that I should minimize images size, and there are many packages I could use but I'm a little bit confused, should I use frontend compression packages (npm packages) or backend packages (Laraver packages) ? what is the deference?

To let you know, images is not static in the website it is uploaded from users, so I should compress any new image that send to server