Now available as a NIF.
$ make
Assuming rebar works for you that should build everything. Yay.
$ make check
Hopefully the tests pass.
Put this app in your Erlang path.
$ erl -pa ebin/
Erlang R13B04 (erts-5.7.5) [source] [64-bit] [smp:2:2] [rq:2] [async-threads:0] [hipe] [kernel-poll:false]
Eshell V5.7.5 (abort with ^G)
1> json:decode(<<"{\"foo\": true}">>).
{ok,{[{<<"foo">>,true}]}}
2> json:encode([true, 1.2, null]).
{ok,<<"[true,1.2,null]">>}
Yeah. It's that easy.