JSON to TypeScript
Infer a TypeScript type from a JSON example.
JSON to TypeScript
Type or paste to update the result automatically.
Your result appears here
Type, paste, or use an example. Copy your result when it is ready.
Cara menggunakan JSON to TypeScript
JSON to TypeScript infers a TypeScript type from a JSON example and outputs it as a single exported type alias with a name you choose. Nested objects become inline object types, arrays become Array types with a union of element types, and empty arrays become unknown[]. Optional fields cannot be detected from a single example.
- Type or paste your source, or load an example.
- Change the basic settings or open Advanced mode to fine-tune the result.
- Review and copy or download your result. Pause Live results to run manually. Sources or individual settings above 20,000 characters require an explicit run.
Fungsi alat ini
Infer a TypeScript type from a JSON example.
- Root type name
- Set this value for your task.
Batas dan pemrosesan
Text operations generally accept up to 2,000,000 characters. Individual parsers, generators and formulas apply additional limits shown by their controls.
Contoh masukan
{"name":"ToolCabana","count":2}Pertanyaan umum
How do I generate a TypeScript type from JSON?
Paste a JSON example, set the Root type name, and run the tool. The result is an export type declaration describing every property and nested value in the example.
Does JSON to TypeScript detect optional properties?
No. The type is inferred from the single example given, so every key present is required and keys that are absent cannot be inferred. Edit the type to add optional markers.
How are arrays with mixed values typed?
The element types are combined into a union, so an array holding strings and numbers becomes an Array type of string | number. An empty array becomes unknown[].
Where is my input processed?
This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.
What are the input limits?
Text operations generally accept up to 2,000,000 characters. Individual parsers, generators and formulas apply additional limits shown by their controls.