Mojo::JSON(3) User Contributed Perl Documentation Mojo::JSON(3)
NAME
Mojo::JSON - Minimalistic JSON
SYNOPSIS
use Mojo::JSON qw(decode_json encode_json);
my $bytes = encode_json {foo => [1, 2], bar => 'hello!', baz => \1};
my $hash = decode_json $bytes;
DESCRIPTION
Mojo::JSON is a minimalistic and possibly the fastest pure-Perl
implementation of RFC 8259 <https://tools.ietf.org/html/rfc8259>.
It supports normal Perl data types like scalar, array reference, hash
reference and will try to call the "TO_JSON" method on blessed
references, or stringify them if it doesn't exist. Differentiating
between strings and numbers in Perl is hard, depending on how it has been
used, a scalar can be both at the same time. The string value has a
higher precedence unless both representations are equivalent.
[1, -2, 3] -> [1, -2, 3]
{"foo": "bar"} -> {foo => 'bar'}
Literal names will be translated to and from Mojo::JSON constants or a
similar native Perl value.
true -> Mojo::JSON->true
false -> Mojo::JSON->false
null -> undef
In addition scalar references will be used to generate booleans, based on
if their values are true or false.
\1 -> true
\0 -> false
The character "/" will always be escaped to prevent XSS attacks.
"</script>" -> "<\/script>"
For better performance the optional module Cpanel::JSON::XS (4.20+) will
be used automatically if possible. This can also be disabled with the
"MOJO_NO_JSON_XS" environment variable.
FUNCTIONS
Mojo::JSON implements the following functions, which can be imported
individually.
decode_json
my $value = decode_json $bytes;
Decode JSON to Perl value and die if decoding fails.
encode_json
my $bytes = encode_json {i => 'H mojolicious'};
Encode Perl value to JSON.
false
my $false = false;
False value, used because Perl has no native equivalent.
from_json
my $value = from_json $chars;
Decode JSON text that is not "UTF-8" encoded to Perl value and die if
decoding fails.
j
my $bytes = j [1, 2, 3];
my $bytes = j {i => 'H mojolicious'};
my $value = j $bytes;
Encode Perl data structure (which may only be an array reference or hash
reference) or decode JSON, an "undef" return value indicates a bare
"null" or that decoding failed.
to_json
my $chars = to_json {i => 'H mojolicious'};
Encode Perl value to JSON text without "UTF-8" encoding it.
true
my $true = true;
True value, used because Perl has no native equivalent.
SEE ALSO
Mojolicious(3), Mojolicious::Guides(3), <https://mojolicious.org>.
perl v5.34.3 2026-10-19 Mojo::JSON(3)
mojolicious 9.510.0 - Generated Thu Oct 22 09:32:11 CDT 2026