JSON to TypeScript
Paste any JSON and instantly generate clean TypeScript interfaces — nested objects and arrays included. Nothing leaves your browser.
TypeScript interfaces appear here…Frequently asked questions
How does JSON to TypeScript conversion work?+
The tool parses your JSON and walks its structure, inferring a type for every field — strings, numbers, booleans, nested objects (as their own interfaces), and arrays (as typed arrays or unions).
Does it handle nested objects and arrays?+
Yes. Nested objects become separate named interfaces, and arrays are typed by their elements — including arrays of objects and mixed-type unions.
Is my JSON sent anywhere?+
No. Conversion runs entirely in your browser; your data is never uploaded or stored.
Want this built into your own software?
These free tools are a taste of what we do. Leave your details and our team will reach out — or build something like this into your systems.
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