JSONToTable

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

How to Convert JSON to TS (TypeScript) - Complete Guide

Step 1

Paste Your JSON Data

Start by adding your JSON data. The tool will automatically analyze the structure and generate TypeScript type definitions:

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Paste JSON: Copy your JSON data directly into the input editor
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Upload file: Click "Upload" to load a .json file from your computer
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Try sample: Use the "Sample" button to see an example conversion
Step 2

Automatic TypeScript Generation

The tool automatically generates TypeScript interfaces with proper type inference:

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Type inference: Automatically detects string, number, boolean, array, and object types
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Nested objects: Generates separate interfaces for complex nested structures
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Array types: Properly handles arrays and generates typed array definitions
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Optional fields: Detects nullable values and adds optional (?) modifiers
Step 3

Copy and Use Your TS Types

Copy the generated TypeScript code and use it in your project:

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Copy to clipboard: One-click copy of the generated TypeScript code
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Download .ts file: Save the TypeScript definitions as a .ts file
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Type safety: Use the generated types for compile-time type checking
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IDE support: Get autocomplete and IntelliSense in your TypeScript projects

Frequently Asked Questions

What is JSON to TS conversion?

JSON to TS (TypeScript) conversion transforms JSON data into TypeScript type definitions or interfaces. This allows you to use type-safe data structures in your TypeScript projects, providing better code completion, error detection, and documentation.

Why convert JSON to TypeScript?

Converting JSON to TypeScript provides type safety, better IDE support with autocomplete, catches errors at compile time instead of runtime, improves code documentation, and makes refactoring safer. It's especially useful when working with API responses or configuration files.

Can this tool handle nested JSON objects?

Yes, the tool automatically detects nested objects and creates separate TypeScript interfaces for each level of nesting. It properly handles complex data structures, arrays of objects, and deeply nested JSON with appropriate type definitions.

What's the difference between interface and type in TypeScript?

Both interfaces and types can describe object shapes in TypeScript. Interfaces are generally preferred for object shapes and can be extended, while types are more flexible and can represent unions, intersections, and primitives. Our tool generates interfaces by default, which is the standard approach for object type definitions.

How do I use the generated TypeScript types?

Copy the generated TypeScript code into a .ts file in your project. Import and use the interfaces to type your variables, function parameters, and return values. For example: const data: YourInterface = await fetch(...). This provides compile-time type checking and IDE autocomplete.

Is this JSON to TS converter free?

Yes, completely free with no limitations. Convert unlimited JSON to TypeScript types with instant generation, proper type inference, and no registration required. Also check out our JSON to TypeScript page for the same functionality.