JSON to TypeScript
Generate TypeScript interfaces from any JSON object automatically. Paste JSON and get ready-to-use TypeScript types instantly.
About JSON to TypeScript
Automatically generate TypeScript interface definitions from any JSON object or array. Handles nested objects, arrays, primitives, and null values. Produces properly named, export-ready TypeScript interfaces — great for quickly typing API responses.
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Your privacy is built in
Everything in JSON to TypeScript runs locally in your browser — your data never leaves your device and is never uploaded to a server, so nothing you enter is stored or seen by anyone else. No account, no sign-up, no watermark, and completely free.
Frequently asked questions
Does it handle nested objects?
Yes! Nested objects are extracted into their own named interfaces. Arrays get typed based on their element types.
Can I use this for API responses?
Yes — paste any JSON response and get TypeScript interfaces ready to paste into your code.
Are the interfaces exported?
Yes, all interfaces are generated with the export keyword.