Is my JSON data uploaded to a server?

No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.

How are nested objects handled?

Each nested object becomes its own @typedef block, referenced from the parent typedef, so your documentation stays modular and readable.

Why use JSDoc instead of TypeScript?

JSDoc typedefs let you type plain JavaScript without adopting TypeScript: editors and tools understand them, with no build step required.

100% local — your data never leaves your browser

JSON to JSDoc Typedef Converter — Free Online Tool

Convert JSON to JSDoc @typedef blocks instantly in your browser. Free, private and offline-friendly: your data never leaves your device.

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Root name

JSON input

JSDoc output

Why convert JSON to JSDoc?

You want typed JavaScript without switching to TypeScript? Paste a sample JSON payload above and get ready-to-use JSDoc @typedef blocks in milliseconds, so your editor can autocomplete and check your plain JavaScript code.

How it works

The converter parses your JSON locally and emits @typedef {Object} blocks with one @property line per field. Each nested object gets its own typedef, referenced from the parent, which keeps the generated documentation modular.

Frequently asked questions

Is my JSON data uploaded to a server?: No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.
How are nested objects handled?: Each nested object becomes its own @typedef block, referenced from the parent typedef, so your documentation stays modular and readable.
Why use JSDoc instead of TypeScript?: JSDoc typedefs let you type plain JavaScript without adopting TypeScript: editors and tools understand them, with no build step required.