JSON to TypeScript Converter
Instantly generate TypeScript interfaces from JSON objects.
Real-time Conversion
Privacy Focused (Client-side)
Smart Type Inference
Customizable Naming
Nested Object Support
One-click Copy
- Input JSON: Paste your JSON data into the editor on the left side.
- View Output: The TypeScript interfaces are automatically generated in the right panel.
- Customize: Click the "Options" button to change the root interface name, add prefixes/suffixes, or switch to type aliases.
- Copy: Click the "Copy Output" button to copy the generated code to your clipboard.
- Real-time Conversion: Results appear instantly as you type or paste JSON.
- Smart Inference: Automatically detects types for primitives, arrays, and unions.
- Nested Support: Deeply nested objects are extracted into clean, separate interfaces.
- Custom Naming: Full control over interface names with prefix and suffix support.
- Syntax Highlighting: Readable, color-coded output for easier review.
- Privacy First: Logic runs 100% in your browser. Sensitive data never leaves your machine.
- Efficiency: Stop manually typing interfaces. Save time and avoid typos.
- Developer Friendly: Designed by developers for developers, with options that matter for real codebases.
- Zero Config: Works straight out of the box with sensible defaults.
Is my JSON data sent to a server?
No. All conversion happens entirely in your browser using client-side JavaScript. Your data never leaves your device.
How does it handle arrays?
The converter analyzes array contents and generates a union type if the array contains mixed types, or a specific type array if all elements are consistent.
Can I customize the interface names?
Yes! Open the 'Options' panel to set a custom root interface name, add prefixes (like 'I'), or suffixes (like 'DTO') to all generated interfaces.
Does it support nested objects?
Absolutely. Nested objects are automatically extracted into their own interfaces to keep the code clean and reusable.
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