If you obtained the WebP.aplugin file:
If you use ACDSee 2021 or earlier, install the separate WebP plugin. If you use 2022–2023, check your File Associations first (WebP may already work). acdsee webp plugin
If your version of ACDSee isn't opening WebP files, here are the three best ways to fix it: 1. The WIC (Windows Imaging Component) Method If you obtained the WebP