Data Conversion

JSON to TypeScript Interface Generator

Automatically generate TypeScript interfaces from your JSON data. Our tool infers primitive types, nested objects, and arrays to produce clean, ready-to-use interface definitions for your TypeScript projects.

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Input JSON

Output (typescript)

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About This Tool

100% Browser-BasedNo Data UploadsPrivacy-First

Frequently Asked Questions

How are types inferred?

The tool examines each JSON value to determine its TypeScript type: strings become string, numbers become number, booleans become boolean, null becomes null, arrays become typed arrays, and objects become nested interfaces.

Is my data private?

Yes. Type generation happens entirely in your browser. No data leaves your device.

Does it handle nested objects?

Yes. Nested objects generate inline type definitions with proper nesting.

Can I use these interfaces in my project?

Yes. Copy or download the generated .ts file and import it directly into your TypeScript project.

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