How does it handle nested objects?

Nested objects are extracted into separate named interfaces based on the property key. For example, a "address" property with an object value generates an Address interface.

What about arrays of objects?

All objects in an array are merged to create a single interface that covers all possible keys. This handles APIs that return slightly different shapes per item.

Can I customize the interface name?

Yes. Change the root name field to set the top-level interface name. Nested interfaces are automatically named based on their property keys in PascalCase.

JSON to TypeScript

Code Converters

Paste any JSON object or array and instantly generate clean TypeScript interface definitions. Handles nested objects, arrays of objects (merged into a single interface), primitive types, and nullable values. Customize the root interface name.

100% client-side processing

JSON Input

Root name:

How to Use JSON to TypeScript Online

Paste your data into the input field above
The result appears instantly in the output area
Click "Copy" to copy the result to your clipboard

Generate TypeScript interfaces from JSON data. Runs 100% client-side — no data is sent to any server.

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