JSON to TypeScript Converter — Generate TS Interfaces Free
Convert any JSON object to TypeScript interfaces instantly. Supports nested objects, arrays, optional fields, and type inference. Free, browser-based.
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Frequently Asked Questions
How do I use JSON to TypeScript?
Paste your JSON object on the left. TypeScript interfaces are generated instantly on the right. Copy or download the .ts file.
Is JSON to TypeScript free?
Yes, JSON to TypeScript on ToolPix is 100% free with no signup or installation required.
Is my data safe?
All conversion happens in your browser, your JSON never leaves your device.
Does it handle nested objects and arrays?
Yes — nested objects generate child interfaces and arrays generate typed array fields like items: Item[].
Can it detect optional fields?
Yes — fields that are null or missing in the sample JSON are marked as optional (field?: type) in the generated interface.
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