There is a decoder in golang.org/x/images/webp already [0], I don't know how full-featured it is: I've never used it. The x libs are part of the Go Project but

There is a decoder in golang.org/x/images/webp already [0], I don't know how full-featured it is: I've never used it. The x libs are part of the Go Project but outside the main Go tree — and are fairly well-known to many Go developers, but clearly not all. Stuff in x sometimes makes its way into the standard library, although not always. And there is a third-party package [1] for webp also, in native Go, which includes both a decoder and an encoder. Plus there are other third-party packages, that bind to external code (C libs, at a guess). — If your complaint is speficially that webp support should be a part of the standard library, then perhaps keep an eye on the stuff in x, that's often where stuff happens before making it into the stdlib. And/or file an issue. And/or you are welcome to contribute code ;) [0] https://pkg.go.dev/golang.org/x https://pkg.go.dev/golang.org/x [1] https://github.com/chai2010/webp https://github.com/chai2010/webp