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Data Transform / JSON to TypeScript
JSON to TypeScript
Generate TypeScript interfaces from JSON data with nested object extraction.
JSON Input
TypeScript Output
TypeScript interfaces appear here
Parse Error
Tips
Auto-convert — Paste any JSON to generate TypeScript interfaces instantly
Nested objects — Extracted as separate named interfaces
Arrays — Typed based on their first element
About JSON to TypeScript
Generate TypeScript interfaces and types from JSON data automatically. Paste any JSON object or array and get clean, properly typed TypeScript interfaces with nested object support. Saves hours of manual type definition when working with APIs.
How to use
- 1Paste a JSON object or array into the input panel.
- 2TypeScript interfaces are generated automatically.
- 3Nested objects are extracted into separate named interfaces.
- 4Copy the TypeScript code and use it in your project.
Frequently Asked Questions
How does it handle nested objects?
Nested objects are automatically extracted into separate TypeScript interfaces with descriptive names based on the property path. This keeps the output clean and reusable.
Does it detect arrays correctly?
Yes. Arrays are typed based on their contents. If all elements are the same type, you get a clean array type. Mixed-type arrays use union types.
Can I customize the root interface name?
Yes. You can change the root interface name in the settings. Nested interfaces are named based on the root name and their property path.