There are a lot of free tools out there for shrinking images for your website. I have no affiliation with the one I’m sharing here but thought it useful and it’s part of my everyday arsenal.
Bulk Images to WebP Converter: https://nsspot.herokuapp.com/imagetowebp/
Simply drag your images from the desktop, or browse for them on your phone. Then save the Zip file with all of the images or individually save them to your mobile device for use in your blog or website.