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The JSON to TypeScript Converter converts JSON objects into TypeScript type definitions in real-time. Paste any valid JSON, choose an interface name, select your preferred architecture (Modular or Single Block), and pick between interface or type syntax. The tool instantly generates clean, formatted TypeScript types ready to copy or download as a .ts file.

Modular mode extracts nested objects into separate reusable types, deduplicating identical object structures — ideal for large, nested schemas. Single Block mode keeps everything inline in one declaration — perfect for simple, flat objects or when you want minimal type declarations.

No. The JSON to TypeScript Converter runs 100% client-side in your browser. Your JSON never leaves your device. All parsing and type generation happens locally using JavaScript, ensuring complete privacy and zero latency.

You can generate either interface declarations (extensible via declaration merging) or type aliases (more flexible for union types). Both are valid TypeScript — choose based on your project's conventions. The output structure remains identical regardless of syntax choice.

Field names follow PascalCase conversion for keys starting with uppercase or special characters, while camelCase keys are preserved as-is. This ensures valid TypeScript identifiers while respecting common JavaScript naming conventions. No additional configuration is currently available, but custom naming rules are planned for future updates.