WebPQuickLook is described as 'By default, macOS doesn't provide previews and thumbnails for WebP, a modern image format providing superior, lossless and lossy compression for images on the web. WebPQuickLook fills this gap by allowing you to see previews and thumbnails of .webp images on your Mac'. There are more than 10 alternatives to WebPQuickLook for Windows, Linux, Mac and Linux Mint. The best alternative is QuickLook, which is both free and Open Source. Other great apps like WebPQuickLook are Preview (Free), Eye of GNOME (Free, Open Source), Seer (Freemium) and CopyTrans HEIC for Windows (Free).
Background : One of the few features I missed from Mac OS X is Quick Look. It allows user peek into a file content in a lightening speed by just pressing the Space key. Windows, on the other hand, does not has this handy feature ... until now.
Eye of GNOME is the official image viewer for the GNOME Desktop environment. With it, you can view single image files, as well as large image collections. The Eye of GNOME supports a variety of image file formats.
eom or the Eye of MATE is a simple graphics viewer for the MATE desktop which uses the gdk-pixbuf library. It can deal with large images, and can zoom and scroll with constant memory usage. Its goals are simplicity and standards compliance. Eye of MATE is a fork of Eye of GNOME.