JSON to TypeScript
Convert JSON to TypeScript interfaces and type definitions
About JSON to TypeScript
How JSON to TypeScript Works
Parses JSON payloads compliant with RFC 8259 and derives strongly-typed TypeScript interfaces and type aliases. Inspects nested objects, primitive types, and heterogeneous arrays client-side via AST synthesis with 0 server uploads, keeping internal schemas completely confidential.
JSON to TypeScript inspects JavaScript Object Notation structures client-side to generate type-safe interfaces, nested models, and type aliases with full support for optional fields and readonly properties.
Frequently asked questions
Is my JSON uploaded to any server?+
No. The parsing, interface generation, and formatting happen 100% inside your browser using client-side JavaScript.
Can I generate Type aliases instead of Interfaces?+
Yes. Use the Output dropdown to switch between 'interface' and 'type' declarations.
Limitations
Heterogeneous arrays of mixed primitive types are typed with the dominant element type or any.