JSON to TypeScript Converter
Generate TypeScript interfaces and types from JSON objects.
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Engine: Client JavaScript
Zero-Upload In-Browser Execution GuaranteeVerified Local RAM
Processed directly on your device. Nothing is uploaded. This tool uses native Web APIs, Canvas, and client-side WebAssembly to process your files inside local browser RAM. No server receives your file, no telemetry logs your data, and no account is required.
Key Capabilities
- Automatically infers nested types, optional properties, and arrays
- Choose between 'interface' and 'type' syntax
- Customizable root interface name
- Exports clean, formatted TypeScript code
How To Use
1
Input JSON
Paste an API response or sample JSON object.
2
Configure Interface
Set the Root interface name (e.g. UserProfile).
3
Copy TS Code
Copy the generated types directly into your TypeScript project.
Frequently Asked Questions
How does it handle nested objects?
It decomposes nested objects into cleanly named sub-interfaces or inlines them based on structure.