Generates TypeScript interfaces to type-check your JSON data.

Detects optional fields?

Some advanced generators infer optional fields if multiple objects are provided in an array.

Yes, it recursively generates interfaces for nested structure.

JSON to TypeScript

Convert JSON to TypeScript interfaces instantly. Generate type-safe definitions, handle nested objects & arrays with union types. Free online tool for developers with export options.

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What is JSON to TypeScript?

JSON to TypeScript Interface Generator instantly creates strongly-typed TypeScript interfaces from raw JSON data. Saves developers having to type types manually.

Key Benefits

Type safety
Time saving
Auto-detection
Nested support

Common Use Cases

•API integration
•Data typing
•Frontend dev
•Refactoring

How to Convert JSON to TypeScript

Input: Paste your JSON object.
Options: Set interface name or settings.
Copy: Copy the TypeScript interface.

Key Features

Generate TypeScript interfaces from JSON
Nested type generation
Optional properties detection
Array type inference
Export type or interface
Copy TypeScript code

Frequently Asked Questions

In-depth guide

Complete Guide to JSON to TypeScript: Generate Type-Safe Interfaces Instantly

Read the full guide →

JSON to TypeScript

Convert JSON to TypeScript interfaces instantly. Generate type-safe definitions, handle nested objects & arrays with union types. Free online tool for developers with export options.

Options

Root Interface Name

Indentation

Generate Types

Generate type aliases instead of interfaces

Prefer Optional

Use optional properties (?) when possible

Add Readonly

Make all properties readonly

JSON Input

💡 Example JSON:

{
  "id": 1,
  "name": "John Doe",
  "email": "[email protected]",
  "isActive": true,
  "tags": ["developer", "typescript"],
  "profile": {
    "age": 30,
    "address": {
      "street": "123 Main St",
      "city": "New York"
    }
  }
}

Frequently Asked Questions

What is JSON to TypeScript converter?

It's a tool that automatically generates TypeScript interfaces or types from JSON data, saving you time and ensuring type safety.

Can I customize the generated TypeScript?

Yes! You can customize indentation, choose between interfaces and types, add readonly modifiers, and more.

Is my JSON data safe?

Absolutely. All conversion happens in your browser - your data never leaves your computer.

Does it handle nested objects?

Yes, the converter automatically handles nested objects and arrays, creating proper TypeScript definitions for all levels.

Can I convert multiple JSON files?

You can convert one JSON file at a time. Simply paste your new JSON and generate the types again.

About

Convert JSON to TypeScript interfaces and types quickly and easily. Perfect for developers who need type-safe code.

Why Use This Tool?

•⚡ Instant Conversion - Transform JSON to TypeScript in milliseconds
•🎯 Type Safety - Ensure your code is type-safe and catch errors early
•🔧 Customizable - Control indentation, naming, and output format
•🌐 Client-Side - All processing happens in your browser for maximum privacy
•✨ Free Forever - No limits, no registration required

Key Features

✓⚡ Instant generation of TypeScript interfaces from JSON
✓🎨 Customizable output with various formatting options
✓🔒 100% client-side processing - your data never leaves your browser
✓📋 One-click copy to clipboard
✓🌳 Handles complex nested structures and arrays

💡 Related Tools

JSON Formatter →
Format and beautify your JSON data
JSON to CSV →
Convert JSON data to CSV format
JSON Validator →
Validate and check your JSON syntax

Loading tool...

What is JSON to TypeScript?

JSON to TypeScript Interface Generator instantly creates strongly-typed TypeScript interfaces from raw JSON data. Saves developers having to type types manually.

Key Benefits

Type safety
Time saving
Auto-detection
Nested support

Common Use Cases

•API integration
•Data typing
•Frontend dev
•Refactoring

How to Convert JSON to TypeScript

Input: Paste your JSON object.
Options: Set interface name or settings.
Copy: Copy the TypeScript interface.

Key Features

Generate TypeScript interfaces from JSON
Nested type generation
Optional properties detection
Array type inference
Export type or interface
Copy TypeScript code

Frequently Asked Questions

In-depth guide

Complete Guide to JSON to TypeScript: Generate Type-Safe Interfaces Instantly

Read the full guide →

{ "id": 1, "name": "John Doe", "email": "[email protected]", "isActive": true, "tags": ["developer", "typescript"], "profile": { "age": 30, "address": { "street": "123 Main St", "city": "New York" } } }

Frequently Asked Questions

What is JSON to TypeScript converter?

It's a tool that automatically generates TypeScript interfaces or types from JSON data, saving you time and ensuring type safety.

Can I customize the generated TypeScript?

Yes! You can customize indentation, choose between interfaces and types, add readonly modifiers, and more.

Is my JSON data safe?

Absolutely. All conversion happens in your browser - your data never leaves your computer.

Does it handle nested objects?

Yes, the converter automatically handles nested objects and arrays, creating proper TypeScript definitions for all levels.

Can I convert multiple JSON files?

You can convert one JSON file at a time. Simply paste your new JSON and generate the types again.

About

Convert JSON to TypeScript interfaces and types quickly and easily. Perfect for developers who need type-safe code.

Why Use This Tool?

•⚡ Instant Conversion - Transform JSON to TypeScript in milliseconds
•🎯 Type Safety - Ensure your code is type-safe and catch errors early
•🔧 Customizable - Control indentation, naming, and output format
•🌐 Client-Side - All processing happens in your browser for maximum privacy
•✨ Free Forever - No limits, no registration required

Key Features

✓⚡ Instant generation of TypeScript interfaces from JSON
✓🎨 Customizable output with various formatting options
✓🔒 100% client-side processing - your data never leaves your browser
✓📋 One-click copy to clipboard
✓🌳 Handles complex nested structures and arrays

JSON to TypeScript

What is JSON to TypeScript?

Key Benefits

Common Use Cases

How to Convert JSON to TypeScript

Key Features

Frequently Asked Questions

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JSON to TypeScript

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Why Use This Tool?

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What is JSON to TypeScript?

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Connection String Parser — แยกส่วน Connection String

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Why Use This Tool?

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What is JSON to TypeScript?

Key Benefits

Common Use Cases

How to Convert JSON to TypeScript

Key Features

Frequently Asked Questions

What does this do?

Detects optional fields?

Nested objects?

Options

JSON Input Input

Frequently Asked Questions

About

Why Use This Tool?

Key Features

💡 Related Tools

What is JSON to TypeScript?

Key Benefits

Common Use Cases

How to Convert JSON to TypeScript

Key Features

Frequently Asked Questions

What does this do?

Detects optional fields?

Nested objects?

Options

JSON Input Input

Frequently Asked Questions

About

Why Use This Tool?

Key Features

💡 Related Tools