The WebP format is good for its small size, however, when working on Photoshop, you will be shown this message when you try to open files with .webp extensions
With a simple workaround you can enable your Photoshop to open, edit and even save images in .webp format.
Download the WebPShop plugin for your particular operating system.
Unzip the package.
Copy the extracted file into Photoshop’s plugin folder
C:\Program Files\Adobe\Adobe Photoshop\Plug-ins
Quit or close and then re-open your Photoshop app.