JSONParserRocket

JSON to TypeScript Converter

Convert JSON data to TypeScript interfaces and types

JSON Input

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TypeScript Output

TypeScript code will appear here

Paste JSON in the input area to get started

From JSON APIs to Type-Safe TypeScript Interfaces

TypeScript brings the power of static typing to JavaScript, catching errors at compile time rather than runtime. Converting JSON to TypeScript interfaces provides the foundation for type-safe web applications, better IDE support, and more maintainable codebases.

For telecom web applications, customer portals, network monitoring dashboards, and administrative interfaces, TypeScript interfaces ensure data consistency across frontend and backend systems while providing excellent developer experience with autocomplete and error detection.

⚙️ Type safety:

TypeScript interfaces catch API contract changes at build time, preventing runtime errors in production!

JSON Input

User dashboard data:

{
  "userId": "USER_789",
  "displayName": "Sarah Johnson",
  "isOnline": true,
  "lastLoginTime": "2024-01-15T09:30:00Z",
  "accountBalance": 156.75,
  "preferences": {
    "theme": "dark",
    "notifications": true,
    "language": "en-US",
    "autoPayEnabled": false
  },
  "activeServices": [
    {
      "serviceId": "SVC_001",
      "serviceName": "5G Premium Plan",
      "status": "active",
      "monthlyFee": 79.99,
      "dataUsageGB": 42.8,
      "renewalDate": "2024-02-15"
    },
    {
      "serviceId": "SVC_002",
      "serviceName": "International Calling",
      "status": "active",
      "monthlyFee": 15.00,
      "minutesUsed": 120,
      "renewalDate": "2024-02-15"
    }
  ],
  "recentActivity": [
    "login",
    "bill_payment",
    "plan_upgrade"
  ]
}

Rich user interface data

Generated TypeScript Interfaces

Type-safe interfaces:

export interface UserDashboard {
  userId: string;
  displayName: string;
  isOnline: boolean;
  lastLoginTime: string; // ISO 8601 datetime
  accountBalance: number;
  preferences: UserPreferences;
  activeServices: ActiveService[];
  recentActivity: string[];
}

export interface UserPreferences {
  theme: string;
  notifications: boolean;
  language: string;
  autoPayEnabled: boolean;
}

export interface ActiveService {
  serviceId: string;
  serviceName: string;
  status: string;
  monthlyFee: number;
  dataUsageGB?: number; // Optional for non-data services
  minutesUsed?: number; // Optional for non-voice services
  renewalDate: string; // ISO 8601 date
}

// Type guards for runtime validation
export function isUserDashboard(obj: any): obj is UserDashboard {
  return (
    typeof obj === 'object' &&
    typeof obj.userId === 'string' &&
    typeof obj.displayName === 'string' &&
    typeof obj.isOnline === 'boolean' &&
    typeof obj.accountBalance === 'number' &&
    Array.isArray(obj.activeServices) &&
    Array.isArray(obj.recentActivity)
  );
}

// Utility types
export type ServiceStatus = 'active' | 'suspended' | 'cancelled';
export type ActivityType = 'login' | 'logout' | 'bill_payment' | 'plan_upgrade' | 'support_ticket';

Complete with type guards and utility types! ✨

When TypeScript Code Generation Transforms Development

React/Vue/Angular Apps

Building customer portals or admin dashboards? TypeScript interfaces provide compile-time safety for props, state, and API responses across your entire application.

API Integration

Consuming REST APIs from billing systems, network management, or customer services? Interfaces ensure your frontend handles API changes gracefully.

Node.js Backend

Building Express.js or Fastify APIs? Shared TypeScript interfaces between frontend and backend ensure consistent data contracts and fewer integration bugs.

Configuration Management

Loading JSON config files for telecom applications? TypeScript interfaces catch configuration errors early and provide excellent autocomplete for settings.

🚀 Pro workflow:

Generate TypeScript interfaces from OpenAPI schemas or GraphQL for end-to-end type safety!