I wholeheartedly agree with this idea. In case anyone wants a fast C++ parser for this, RapidJSON [1] has optional support for comments and trailing commas; I a

I wholeheartedly agree with this idea. In case anyone wants a fast C++ parser for this, RapidJSON [1] has optional support for comments and trailing commas; I actually added trailing comma support to it. I did this to support hand-writing game data in JSON (e.g. monster stats, campaign dialog scripts) and then converting it to MessagePack at build time [2]. This gives you very high simplicity (no schemas) and excellent performance. [1] http://rapidjson.org/ http://rapidjson.org/ [2] https://github.com/ludocode/msgpack-tools https://github.com/ludocode/msgpack-tools