JSON Schema to TypeScript Converter - Generate Interfaces Online

📘 JSON Schema to TypeScript

Convert JSON Schema to TypeScript interfaces and types. Perfect for type-safe development.

📝 Input JSON Schema:
📤 Output TypeScript:
// TypeScript interfaces will appear here...
Interfaces: 0
Properties: 0
Nested: 0
💡 Example JSON Schema Samples:
📄 Simple Object
Basic object schema
🔗 Nested Object
Schema with nested objects
📋 Array Schema
Schema with arrays

Online JSON Schema to TypeScript Converter

Stop manually writing interfaces! Our JSON Schema to TypeScript tool allows you to instantly generate clean, accurate TypeScript type definitions from your JSON Schemas. Whether you are working with API responses, configuration files, or data validation logic, this tool ensures your code remains type-safe and synchronized with your schemas.

Why Convert JSON Schema to TypeScript?

TypeScript is essential for modern development, but manually mirroring your JSON Schemas into TS interfaces is time-consuming and prone to errors.

Enhance Type Safety

By generating types directly from your source of truth (the JSON Schema), you eliminate the risk of "type drift." Your editor will provide accurate autocomplete and catch potential bugs before they reach production.

Save Hours of Manual Coding

Defining complex, nested objects with dozens of properties can take hours. Our converter does the heavy lifting in milliseconds, allowing you to focus on building features rather than writing boilerplate code.

Key Features of Our Converter

Our tool is designed to produce high-quality, readable TypeScript code that adheres to industry best practices.

1. Support for Nested Objects & Arrays

The converter recursively parses your schema, creating separate interfaces for nested objects and correctly identifying array types to ensure deep type coverage.

2. Handles Optional & Required Properties

Our engine strictly follows the required array in your JSON Schema. Properties not listed as required will be automatically marked as optional in TypeScript using the ? operator.

3. Support for Enums and Unions

If your schema includes enum, anyOf, or oneOf keywords, our tool will intelligently map them to TypeScript union types or string literal enums, preserving the original validation logic.

How to Use the JSON Schema to TS Tool

  1. Paste your JSON Schema: Input your valid schema into the left-hand editor.

  2. Configuration: (Optional) Choose between interface or type definitions and set your root name (e.g., RootObject or User).

  3. Generate: The TypeScript code is generated instantly as you type or upon clicking "Convert".

  4. Copy to Project: Use the "Copy" button to grab the code and paste it directly into your .ts or .tsx file.

Technical Mapping Details

Mapping JSON Types to TypeScript

Our tool performs precise type mapping to ensure compatibility:

  • string → string

  • number / integer → number

  • boolean → boolean

  • object → interface or Record

  • null → null

Documentation & Comments

If your JSON Schema includes description or title fields, our converter can transform these into JSDoc comments above the generated interface properties, making your code easier to understand for your team.

Frequently Asked Questions (FAQ)

Is this tool compatible with JSON Schema Draft 7?

Yes, we support major drafts including Draft 4, Draft 6, and Draft 7. We are constantly updating our engine to support newer features like those in 2020-12.

Can I convert large schemas with hundreds of lines?

Absolutely. The converter is built for performance and can handle massive schemas with deep nesting without slowing down your browser.

Does my code stay private?

Yes. All processing happens locally within your browser's memory. We never upload your schemas or the generated TypeScript code to our servers.