How to pretty-print JSON using Dart.

README.md

#dart:convert example

How to pretty-print JSON using Dart.

How to display JSON in an easy-to-read (for human readers) format.

Main library: dart:convert
Main element: JsonEncoder.withIndent
Gist: https://gist.github.com/kasperpeulen/d61029fc0bc6cd104602
DartPad: https://dartpad.dartlang.org/d61029fc0bc6cd104602
Tags: #json #pretty-print

main.dart

import 'dart:convert';

main() {
  Map json = {
    'name' : 'Kasper Peulen',
    'best_language': 'dart',
    'best_chat': 'https://dartlang.slack.com'
  };
  JsonEncoder encoder = new JsonEncoder.withIndent('  ');
  String prettyprint = encoder.convert(json);
  print(prettyprint);
}

pubspec.yaml

name: dart.convert_JsonEncoder.withIndent
description: |
  How to pretty-print JSON using Dart.

  How to display JSON in an easy-to-read (for human readers) format.
tags: 'json pretty-print'
homepage: https://gist.github.com/kasperpeulen/d61029fc0bc6cd104602
environment:
  sdk: '>=1.0.0 <2.0.0'

For long logs, this works fine:

  static JsonDecoder decoder = JsonDecoder();
  static JsonEncoder encoder = JsonEncoder.withIndent('  ');

  static void prettyPrintJson(String input) {
    var object = decoder.convert(input);
    var prettyString = encoder.convert(object);
    prettyString.split('\n').forEach((element) => print(element));
  }

Thank you