JSON to TypeScript Converter

Convert any JSON into TypeScript interfaces or types with advanced configuration options. All processing happens locally in your browser.

config.json

Advanced Conversion Options

input.json
types.ts

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Frequently asked questions

Paste your JSON into the editor, choose interface or type alias, configure options like nested style, optional properties, and strict null checks. The tool generates TypeScript code instantly in your browser.

No. All conversion happens 100% client-side in your browser. Your data never leaves your machine.

Interfaces can be extended and merged, ideal for public APIs. Type aliases support unions, intersections, and primitives. Both work for JSON structures — choose based on your project conventions.

Yes. Enable 'Optional properties (nullable)' to mark null/undefined fields as optional (?). Enable 'Strict null checks' for explicit null types.

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