JSON to TypeScript Interface: Convert JSON Data to Type-Safe Code

Working with APIs and JSON data in TypeScript projects? Our free JSON to TypeScript Interface converter instantly generates type-safe interfaces from any JSON object, saving you from manual type definitions.

How to Use the JSON to TypeScript Converter

1. Paste your JSON into the input area
2. Set the root interface name (defaults to “Root”)
3. See the TypeScript interface generated instantly
4. Copy the result with one click

The tool handles nested objects, arrays, optional fields, and primitive types automatically.

Common Use Cases

• API integration: Paste an API response to generate request/response types
• Database models: Convert JSON documents to TypeScript interfaces
• Configuration files: Type-check your JSON config structures
• Mock data: Generate types from sample data during development

Frequently Asked Questions

Does it handle nested objects? Yes. Nested objects are converted into separate interfaces that reference each other, creating a clean type hierarchy.

What about arrays? Arrays are typed based on their contents. An array of objects generates a typed interface for the array items.

Can I use the output directly in my project? Absolutely. The generated interfaces are valid TypeScript that you can paste directly into your .ts or .d.ts files.

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Try our free JSON to TypeScript Interface converter now.