WebKitGTK works fine with GTK 4. You have three API versions to choose from: * webkit2gtk-4.0: GTK 3, libsoup 2 * webkit2gtk-4.1: GTK 3, libsoup 3 * webkitgtk-6.0: GTK4, libsoup 3 I've never heard of the webview project before, but from a quick look it is using webkit2gtk-4.0 unfortunately. Michael