$ echo '{"field": "кирилица"}' | json_pp 
{
   "field" : "киÑилиÑа"
}
$ locale
LANG=en_US.UTF-8
LANGUAGE=en_US
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=ru_RU.UTF-8
LC_TIME=ru_RU.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=ru_RU.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=ru_RU.UTF-8
LC_NAME=ru_RU.UTF-8
LC_ADDRESS=ru_RU.UTF-8
LC_TELEPHONE=ru_RU.UTF-8
LC_MEASUREMENT=ru_RU.UTF-8
LC_IDENTIFICATION=ru_RU.UTF-8
LC_ALL=

$ file /usr/bin/json_pp
/usr/bin/json_pp: Perl script text executable

>>> Number.MAX_VALUE*1.0000000000000001 === (1/0) 
false
>>> Number.MAX_VALUE*1.0000000000000002 === (1/0) 
true

>>>Math.min() < Math.max();
false

>>> parseFloat( 'Infinity' )
Infinity
>>> Number( 'Infinity' )
Infinity
>>> parseInt( 'Infinity', 10 )
NaN
>>> parseInt( 'Infinity', 18)
NaN
>>> parseInt( 'Infinity', 19)
18
>>> parseInt( 'Infinity', 24)
151176378
>>> parseInt( 'Infinity', 37)
NaN