JSON to type definitions

How to use

1. Paste a JSON sample—an API response, for example—into the left pane.
2. Choose the output language: TypeScript, Go, or Python.
3. Rename the root type if you like; nested objects are named after their key.
4. Copy the generated definitions into your project.

Notes

• •Types are inferred from one sample, so fields and values the sample never shows cannot be represented.
• •Array elements are merged, so keys missing from some elements become optional—include several shapes for a better result.
• •JSON does not distinguish integers from floats; a value without a decimal point is inferred as an integer type.
• •A field that is only ever null carries no type, so it becomes null in TypeScript and any/Any in Go and Python.
• •Dates and UUIDs are inferred as strings; swap in a richer type after generating if you need one.