Convert WebP image files (Linux)

Make sure you have imagemagick installed (sudo apt install imagemagick):

$ identify image.webp 
image.webp WEBP 1000x420 1000x420+0+0 8-bit sRGB 30652B 0.000u 0:00.000

$ convert image.webp image.png

$ identify image.png 
image.png PNG 1000x420 1000x420+0+0 8-bit sRGB 242919B 0.000u 0:00.000