Windows users can open WebP in MS Paint or the Windows Photo app and select “save as” and save it as a PNG or JPG.

Reminds me of a funny story I heard Tom Petty once tell. Apparently, he had a buddy with a POS car with a crappy stereo, and Tom insisted that all his records had to be mixed and mastered not so that they sound great on the studio’s million dollar equipment but in his friend’s car.