There already exists a "binary analogy" of JSON called Protocol Buffers or Kiwi. They are pretty simple (a parser can be made in 2 kB of code). Wouold be great if the author compared his reinvented wheel with existing wheels :D
I find these blogs which show how the author finds out about someting a bit boring, as they often show the way to something obvious and making it seem like its something profound.
cbor is a json analogue.