This is only somewhat related, but I've used Go's protojson lib for pretty printing protobuf encoded data: https://godoc.org/google.golang.org/protobuf/encoding

This is only somewhat related, but I've used Go's protojson lib for pretty printing protobuf encoded data: https://godoc.org/google.golang.org/protobuf/encoding/protojson#Format https://godoc.org/google.golang.org/protobuf/encoding/protoj... They say not to rely on the output being stable, so I would recommend guaranteeing a stable translation yourself for a REST client. You can achieve this by translating from the JSON to your proto or grpc service structure yourself.