How to Use the JSON to TypeScript Interface & Type Generator
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1
Paste your raw JSON API response or data object in the input editor.
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2
Set the Root Interface Name (e.g., `UserResponse`, `ProductData`).
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3
Choose whether to generate `interface` or `type`, and whether null properties should be marked optional (`?`).
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4
Click "Copy TypeScript Code" to paste directly into your `.ts` codebase.
Practical Example & Use Case
Common Real-World Scenario
Pasting a Stripe or GitHub webhook JSON payload and getting 100% accurate, nested TypeScript interfaces in 1 second.
Technical Notes & Limitations
Browser Engine Architecture
Recursively parses arrays, nested objects, primitives, and union types.
Frequently Asked Questions
How are arrays of objects handled?
The generator inspects elements to synthesize a unified interface representing all objects in the array.