JSON to JSDoc Typedefs
Generate JSDoc @typedef blocks from JSON for typed JS.
Use JSON to JSDoc Typedefs to skip the boilerplate of hand-writing data models. It's the go-to free choice when you're consuming a JSON API and need matching jSDoc Typedefs fast — paste, copy, done. No sign-up, no install, and your payload never leaves the browser.
About JSON to JSDoc Typedefs
Building a typed app and tired of hand-writing models? JSON to JSDoc Typedefs turns a real JSON payload into jSDoc Typedefs in a single paste — it generate JSDoc @typedef blocks from JSON for typed JS. Drop in an API response, copy the generated code, and keep your types in lockstep with the data. Like every ToolJolt utility it runs 100% in your browser — no sign-up, no upload, and nothing ever sent to a server, so it's safe for proprietary code and confidential data.
How to use JSON to JSDoc Typedefs
- 1Paste a representative JSON payload (an API response works great).
- 2The tool infers the field types and nested structures instantly.
- 3Review the generated code, then copy or download it straight into your project.
- 4Tweak the JSON and re-run any time — it's free and unlimited.
Why use JSON to JSDoc Typedefs?
- ✓Infers types automatically from a real JSON sample
- ✓Handles nested objects and arrays of objects
- ✓Copy or download the generated types in one click
- ✓Saves the tedious, error-prone work of writing models by hand
Frequently asked questions
How does JSON to JSDoc Typedefs infer types?+
It walks your JSON sample and maps each value to the closest static type — numbers, strings, booleans, arrays and nested objects each become the idiomatic type for the target language. Provide a complete example for the most accurate result.
Will the generated code compile as-is?+
It's designed to drop straight in, but you should review naming and nullability. JSON can't express every nuance (e.g. unions or optionals), so treat the output as a strong first draft you can refine.
Is JSON to JSDoc Typedefs free?+
Yes. JSON to JSDoc Typedefs is completely free with no sign-up, no account, no usage limits and no watermarks. Use it as often as you like.
Does JSON to JSDoc Typedefs send my data to a server?+
No. JSON to JSDoc Typedefs runs entirely in your browser with JavaScript — your input never leaves your device, which makes it safe for private API payloads, schemas and source code.
Embed JSON to JSDoc Typedefs on your website
Want JSON to JSDoc Typedefson your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/json-to-jsdoc" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="JSON to JSDoc Typedefs — ToolJolt" loading="lazy"></iframe>Related Data tools
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