TypeScript to JSON Converter
Generate sample JSON data from TypeScript interfaces instantly.
Paste your types and get mock data for testing.
How it works
Generates sensible placeholder values: string → "string", number → 0, boolean → true
Handles nested objects and references to other interfaces. All nested structures are recursively converted to JSON.
For union types like string | null, uses the first non-null type to generate the value.
Supported Types
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