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.
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Download the WebPShop plugin 4 for your particular operating system.
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Unzip the package.
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Copy the extracted file into Photoshop’s plugin folder
C:\Program Files\Adobe\Adobe Photoshop\Plug-ins
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Quit or close and then re-open your Photoshop app.