The big problem of uploading huge images

[Mich-adg]

Hi all,

i have an important question about the images upload.
The problem is:
- images are always larger and larger with new cameras / smartphones etc. (sometimes clients are trying to upload 4000 pix. wide images in 300 dpi !!)
- users don't want to manually resize the pictures: they just want to upload the file.
- I don't want to host very big files on the server (space problem).

So, what can we do to force the image resizing before / during upload? (I often create extra "image" field in news templates, so that the user can simply upload a file).
I see that Wordpress has a module to handle this problem: https://wordpress.org/plugins/imsanity/. But for cmsms, what can be the solution?? It's a critical problem for me and for my clients... that are looking for the simplest tool!

Thanks for any help !