JSON to TypeScript.

Pandia turns a JSON document into an idiomatic export interface hierarchy. It samples the data and infers the shape: fields that are missing in some objects become optional, and null values become nullable — so the types match the data you actually have.

Example

Input JSON:

{
  "id": 42,
  "name": "Ada",
  "active": true,
  "tags": ["admin", "early"]
}

TypeScript output:

export interface Root {
  id: number;
  name: string;
  active: boolean;
  tags: string[];
}

What you get

• Idiomatic export interface output with a Root entry point.
• Optional (?) and nullable fields inferred from the document.
• Nested objects and arrays become their own named interfaces.
• Deterministic and not configurable — pick the target, copy, paste.

It’s the same engine behind Pandia’s type generation — opinionated, deterministic, and built to run on files far too large for an online converter.

Frequently asked questions

How does Pandia generate TypeScript from JSON?

Open the Types panel, choose TypeScript, and Pandia infers an interface hierarchy from the document — copy the output and paste it into your project.

Are optional and nullable fields handled?

Yes. Fields missing from some objects are marked optional, and null values become nullable, so the generated interfaces reflect the real data.

Does it work offline and on large files?

Yes — generation runs entirely on your machine with no upload, and Pandia handles multi-gigabyte JSON without freezing.

More converters: JSON to Go · JSON to Rust · JSON to Python · JSON to Zod · JSON to YAML · all tools · download.