jsonpost
Code Generation

JSON to TypeScript Interface Generator

Paste JSON and instantly generate accurate TypeScript interfaces, including nested and optional fields.

Runs entirely in your browser — your data never leaves your device.

Loading tool…

How to use this tool

  1. 1Paste a sample JSON response into the editor.
  2. 2Adjust the root type name if needed.
  3. 3Copy the generated TypeScript interfaces.

Frequently asked questions

Does it handle nested objects and arrays?
Yes. Nested objects become their own interfaces and arrays are typed by their element shape.
Can it produce types instead of interfaces?
The generator produces idiomatic TypeScript interfaces; you can adapt them to type aliases if your codebase prefers them.
Is my data uploaded to a server?
No. Every tool on JSONPost runs entirely in your browser using JavaScript. Your JSON never leaves your device, so it is safe to use with private or sensitive data.

Related tools

JSON to Go Struct Generator

Generate Go structs with correct field types and JSON tags from sample data.

JSON to Python Generator

Generate Python dataclasses or Pydantic models with correct type hints from JSON samples.

JSON Schema Generator

Automatically generate a JSON Schema (draft-07 or 2020-12) from any sample JSON document.