The built-in APIs for handling images (GDI+) added WebP support in 1809.
The end user doesn’t work with Windows API. The end user works with web sites and apps, which are rarely native these days. And there you’re often limited to png/jpg for uploads.
The end user doesn’t work with Windows API. The end user works with web sites and apps, which are rarely native these days. And there you’re often limited to png/jpg for uploads.