WebP is a modern image format that provides superior lossless and lossy compression for images on the web. Using WebP, webmasters and web developers can create smaller, richer images that make the web faster.
It is good for rendering on the browsers but common image tools still don't support webp format.
Here is the simple way to convert webp image format to common format like png and jpeg.
WebP Converter Download
Convert your favorite collection from PNG and JPEG to WebP by downloading the precompiled
cwebp conversion tool for Linux, Windows or Mac OS X.
Precompiled utilites download here
It's easy to download the library via Homebrew or MacPorts
brew install webp
once installed successfully, you can use the decoder library dwebp
dwebp filename.webp -o filename.png