Text & Data
JSON to TypeScript
Paste sample JSON and generate interface definitions with nested objects and arrays. Great for bootstrapping types from API responses.
Runs entirely in your browser. Your data never leaves this device.
- Nested interfaces
- Array inference
- Optional nullish unions
- Copy TS
- Client-side
Workspace
Client-side · No upload
How it works
- Adjust the controls or paste your input.
- Preview results instantly in the browser.
- Copy or download the output — nothing is uploaded.
Key features
- Nested interfaces
- Array inference
- Optional nullish unions
- Copy TS
- Client-side
FAQ
Is this private?
Yes — processing runs in your browser; we do not upload your inputs.
Do I need an account?
No — free to use without signup.
Does it work offline?
After the page loads, most tools work without further network calls.
Mobile friendly?
Yes — layouts adapt to smaller screens.
Keep building
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