Will the WordPress plugins work on a localhost?
Unfortunately, both ShortPixel Adaptive Images and ShortPixel Image Optimizer will only work on publicly accessible websites. If your website is locally hosted, then it's not publicly accessible thus you cannot use our plugins to optimize it :-(
Please note that this applies also to Intranet hosted websites, they are also not publicly accessible.
If you wish to test our plugins and see how they work, you can use a WordPress sandbox system like this one.