You right-clicked an image in Chrome, hit "Save image as", and ended up with a . webp file. Now it won't open in Windows Photos, won't send via WhatsApp, and won't upload to half the platforms you need it for.
Source: [Dev.to](https://dev.to/toolzip/why-chrome-saves-images-as-webp-and-how-to-convert-them-without-uploading-2jk1)