JSON to TypeScript Converter
Generate TypeScript interfaces from JSON objects instantly.
How to Use JSON to TypeScript
Paste JSON on the left
Set the root interface name
Copy the generated TypeScript interfaces
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No upload wait time. Results in seconds
No daily limits, no file count limits
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About JSON to TypeScript
TypeScript interfaces provide compile-time type safety for JSON data structures. Instead of manually writing interfaces, this tool infers types from sample JSON data and generates ready-to-use TypeScript code.
Supported Types
- Primitives: string, number, boolean, null
- Nested objects: Generates separate named interfaces
- Arrays: Inferred from the first element's type
Frequently Asked Questions
Does it handle nested objects?
Yes — nested objects are converted to separate interfaces. Each nested object gets its own named interface based on the key name.
What about arrays?
Arrays are typed based on the first element. An array of objects generates a separate interface for the item type.