JSON to TypeScript Interface Converter
Instantly convert JSON objects into clean TypeScript interfaces, type aliases, and nested types.
How to Use JSON to TypeScript Interface Converter
1. Enter or Paste Input
Paste your raw data, code payload, or text document directly into the editor.
2. Instant In-Browser Processing
Formatting, validation, or transformation algorithms execute locally with zero network latency.
3. Copy or Export Output
One-click copy formatted outputs or download clean generated files immediately.
How This Utility Works
Transforms arbitrary JSON payloads into strongly-typed TypeScript interfaces. Handles primitive inference, nested sub-objects, arrays of objects, optional fields, and type aliases. Includes real-time compilation, customizable root interface naming, and 1-click clipboard copy. 100% client side.
Tokens, internal JSON payloads, and source code are parsed strictly inside your local browser runtime. Zero bytes are uploaded to remote servers.
Frequently Asked Questions
How does it infer array types?
It analyzes elements within arrays to deduce homogeneous types (e.g. string[], number[]) or creates unified union types when elements differ.
Can I export Type aliases instead of Interfaces?
Yes! Toggle between interface and type alias generation in the settings toolbar.