JSON to JSDoc Converter

What is JSON to JSDoc Converter?

JSON to JSDoc Converter is a developer utility that automates the creation of JSDoc type definitions from raw JSON data. If you are working on a JavaScript project without TypeScript, JSDoc is the standard way to provide type safety and documentation.

Manually writing @typedef and @property tags for large, nested JSON objects is tedious and error-prone. This tool recursively traverses your JSON and generates the corresponding JSDoc structure in seconds.

How to Use

1. Paste Your JSON: Enter the JSON data you want to convert into the input area.
2. Set Root Type Name: Give your main object a descriptive name (e.g., UserResponse or Product).
3. Review Output: The tool generates a hierarchy of @typedef blocks for the root object and any nested objects or arrays it finds.
4. Copy into Code: Use the "Copy JSDoc" button and paste the definitions above your functions or in a dedicated types.js file.

Features

• Recursive Processing: Automatically handles nested objects and arrays of objects.
• Smart Type Detection: Detects basic types like string, number, boolean, and identifying null values.
• Custom Root Name: Personalize the name of the main type to fit your codebase.
• Improved IntelliSense: Once added to your project, IDEs like VS Code will use these definitions to provide better autocomplete and error checking.
• Mobile Friendly: Designed to work across all devices.
• Privacy Guaranteed: Your JSON data is processed entirely in your browser; nothing is uploaded to any server.

Why use JSDoc for JSON?

Documentation is critical for long-term project maintenance. By converting your JSON models to JSDoc:

• Autocomplete: Your IDE can suggest property names as you type.
• Documentation: Other developers can instantly see the structure of API responses.
• Type Safety: Tools like tsc (TypeScript compiler) can use JSDoc comments to find potential bugs in your JavaScript code.
• Consistency: Standardize how your data models are described across the team.

FAQ

Q: Does it support complex nested objects?
A: Yes! The tool recursively creates new @typedef definitions for every unique object structure it finds within your JSON.

Q: Can I use this for arrays?
A: If the top-level is an array, it will try to define types for the items within that array. For properties that are arrays, it uses the Array<Type> syntax.

Q: Is it compatible with VS Code?
A: Yes, VS Code has excellent built-in support for JSDoc and will automatically pick up these definitions for IntelliSense.

Q: What happens with null values?
A: The tool identifies null properties and marks their type as null in the JSDoc definition.

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