Paste a JSON response to get matching structs, records and typed interfaces.
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JSON response
16 lines
Inferred shape
3 types14 fieldsdepth 21 optional
Types emittedRoot, Customer, Item
string4 fields
integer2 fields
number2 fields
boolean2 fields
array2 fields
object1 field
null1 field
Optional becausea null value or a key missing from one array item
22 lines
Hand-written types drift the moment the API changes.Generate a typed client from your OpenAPI spec, models included, and regenerate it whenever the spec changes.
–LanguagesTypeScript, Python, Go, Java, PHP and C#
–ValidationShape inferred from the sample
×SDK generationNot included
×RegenerationNot included
×CollaborationNot included
FAQ
Does it only generate TypeScript?
No. The same JSON sample generates TypeScript interfaces, Python Pydantic models, Go structs, Java records, PHP classes or C# records — pick the target and the output changes
Why is a field marked optional when my API always returns it?
A field is marked optional when it was null in your sample, or when it was missing from at least one item in an array. If your sample was not representative, paste a larger one
Can it infer types from a JSON schema or OpenAPI file?
No — it reads a JSON value, not a schema. If you already have an OpenAPI definition, the OpenAPI visualizer and linter is the tool for that
Is my payload uploaded anywhere?
No. Inference runs entirely in your browser, so production payloads never leave the page