Free JSON to TypeScript ConverterInterfaces from an example.

Paste an API response and get TypeScript interfaces you can drop into your code.
Also writes Zod schemas, Go structs and Python dataclasses.

Optional & nullableZod, Go, Python tooNo upload

No sign-up No upload No limits

FromTo

Input

Or try an example

Paste or open data to convert it.

Output

Root type name

Your data is converted in this browser tab and never leaves your device.

THREE SIMPLE STEPS

How to use the JSON to TypeScript

Paste example JSON

Paste an API response or drop a .json file. More items in lists give better types.

Name the root type

Choose TypeScript, Zod, Go or Python and name the top-level type.

Copy the types

Copy them into your project or download the file.

WaveSpeed AI

Building something with an API?

Generate images, video and 3D models from your own code with WaveSpeed AI.

Start creating Explore 1,000+ AI Models

1,000+ AI models
Image, video and 3D
Pay as you go

$1 in free credits for eligible new accounts. No card needed. Generators have separate account and credit requirements. The data format converter is free.

JSON to TypeScript FAQ

Is this JSON to TypeScript converter free?

Yes, with no account and no limits.

Is my JSON uploaded?

No. It is converted in your browser tab and never leaves your device.

How are optional fields found?

A field missing from some items of a list becomes optional (?), and a field that is null in some items becomes “| null”. Objects with the same shape share one interface.

Can it make Zod schemas?

Yes. Choose Zod schema: each object gets a schema and a matching type from z.infer, in an order that compiles.

All Free Tools

Data Format Converter YAML to JSON JSON to YAML XML to JSON JSON to XML TOML to JSON CSV to JSON