JSON\_PP(1) Perl Programmers Reference Guide JSON\_PP(1)

# [NAME](#NAME)

json\_pp - JSON::PP command utility

# [SYNOPSIS](#SYNOPSIS)

```
    json_pp [-v] [-f from_format] [-t to_format] [-json_opt options_to_json1[,options_to_json2[,...]]]
```

# [DESCRIPTION](#DESCRIPTION)

json\_pp converts between some input and output formats (one of them is JSON). This program was copied from json\_xs and modified.

The default input format is json and the default output format is json with pretty option.

# [OPTIONS](#OPTIONS)

## [-f](#f)

```
    -f from_format
```

Reads a data in the given format from STDIN.

Format types:

[json](#json)

as JSON

[eval](#eval)

as Perl code

## [-t](#t)

Writes a data in the given format to STDOUT.

[null](#null)

no action.

[json](#json~2)

as JSON

[dumper](#dumper)

as Data::Dumper

## [-json\_opt](#json_opt)

options to JSON::PP

Acceptable options are:

```
    ascii latin1 utf8 pretty indent space_before space_after relaxed canonical allow_nonref
    allow_singlequote allow_barekey allow_bignum loose escape_slash indent_length
```

Multiple options must be separated by commas:

```
    Right: -json_opt pretty,canonical
    Wrong: -json_opt pretty -json_opt canonical
```

## [-v](#v)

Verbose option, but currently no action in fact.

## [-V](#V)

Prints version and exits.

# [EXAMPLES](#EXAMPLES)

```
    $ perl -e'print q|{"foo":"あい","bar":1234567890000000000000000}|' |\
       json_pp -f json -t dumper -json_opt pretty,utf8,allow_bignum
    
    $VAR1 = {
              'bar' => bless( {
                                'value' => [
                                             '0000000',
                                             '0000000',
                                             '5678900',
                                             '1234'
                                           ],
                                'sign' => '+'
                              }, 'Math::BigInt' ),
              'foo' => "\x{3042}\x{3044}"
            };
    $ perl -e'print q|{"foo":"あい","bar":1234567890000000000000000}|' |\
       json_pp -f json -t dumper -json_opt pretty
    
    $VAR1 = {
              'bar' => '1234567890000000000000000',
              'foo' => "\x{e3}\x{81}\x{82}\x{e3}\x{81}\x{84}"
            };
```

# [SEE ALSO](#SEE_ALSO)

JSON::PP, json\_xs

# [AUTHOR](#AUTHOR)

Makamaka Hannyaharamitu, <makamaka\[at]cpan.org>

# [COPYRIGHT AND LICENSE](#COPYRIGHT_AND_LICENSE)

Copyright 2010 by Makamaka Hannyaharamitu

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

2026-10-26 perl v5.44.0

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Document: json_pp(1) from perl 5.44.0-r3 (Chainguard OS)
Source: https://github.com/Perl/perl5.git