smart_json_parser #

Author: Richa Jituri
GitHub: https://github.com/RichaJituri

smart_json_parser is a lightweight helper for safely reading values from dynamic JSON in Dart and Flutter apps, avoiding runtime crashes from inconsistent API responses.

Features #

• Safe JSON parsing
• Handles null values
• Supports int, double, bool, and String
• Lightweight and dependency-free
• Works with Flutter and pure Dart

Installation #

Add smart_json_parser to your pubspec.yaml:

dependencies:
  smart_json_parser: ^1.0.3

Then run:

dart pub get

For Flutter:

flutter pub get

Usage Example #

Import the package:

import 'package:smart_json_parser/smart_json_parser.dart';

Parse JSON values safely:

final json = {
  'id': '10',
  'price': '45.5',
  'isActive': 'true',
};

final id = SmartJson.intValue(json['id']);
final price = SmartJson.doubleValue(json['price']);
final isActive = SmartJson.boolValue(json['isActive']);
final name = SmartJson.stringValue(json['name']); // falls back to default ""

Supported Types #

SmartJson currently supports:

• int via SmartJson.intValue(...)
• double via SmartJson.doubleValue(...)
• bool via SmartJson.boolValue(...)
• String via SmartJson.stringValue(...)

Each helper accepts a defaultValue parameter that is returned when parsing fails.

Why smart_json_parser? #

Many real‑world APIs return values in unexpected formats, for example:

{
  "age": "25",
  "price": "12.5",
  "active": "true"
}

age should be an int, price a double, and active a bool, but everything comes back as String.
smart_json_parser lets you safely convert these values to the types you expect, with sensible defaults instead of runtime exceptions.

Example JSON Parsing #

See the runnable example in example/main.dart:

import 'package:smart_json_parser/smart_json_parser.dart';

void main() {
  final json = <String, dynamic>{
    'age': '30',
    'salary': '55000.75',
    'verified': 'true',
    'name': 'Richa',
  };

  final age = SmartJson.intValue(json['age']);
  final salary = SmartJson.doubleValue(json['salary']);
  final verified = SmartJson.boolValue(json['verified']);
  final name = SmartJson.stringValue(json['name']);

  print('Age: $age');
  print('Salary: $salary');
  print('Verified: $verified');
  print('Name: $name');
}

Run it from the package root:

dart run example/main.dart

License #

This project is licensed under the MIT License.
See the LICENSE file for details.