{"generatedAt":"2026-07-19T03:01:59.441Z","tool":{"id":"json-to-typescript","name":"JSON to TypeScript Converter","description":"Convert JSON to TypeScript interfaces and types with smart type inference, nested objects, and union types","category":"converter","icon":"TS","keywords":["json","typescript","converter","interface","type","generator","json to ts","nested","union types"],"remoteCallable":true,"remoteMode":"dedicated_api","riskClass":"L","maxInputBytes":131072,"timeoutMs":2000,"supportsStreaming":false,"url":"/json-to-typescript/","tags":["converter"],"faqs":[{"question":"What is JSON to TypeScript Converter?","answer":"JSON to TypeScript Converter generates TypeScript interfaces and types from JSON data. It uses smart type inference to handle nested objects, arrays, optional fields, and union types."},{"question":"How do I use JSON to TypeScript Converter?","answer":"Paste your JSON data into the editor. The tool analyzes the structure and generates matching TypeScript interfaces with proper types for all fields, including nested objects and arrays. Copy the output into your project."},{"question":"Is JSON to TypeScript Converter free?","answer":"Yes. This tool is free to use with immediate access—no account required."},{"question":"Does JSON to TypeScript Converter store or send my data?","answer":"No. All processing happens entirely in your browser. Your JSON data never leaves your device — nothing is sent to any server."},{"question":"Does JSON to TypeScript Converter handle nested objects?","answer":"Yes. It creates separate named interfaces for nested objects and properly types arrays, including arrays of objects. It also detects union types when array elements have different structures."}],"howTo":[{"title":"Paste valid JSON","description":"Input a JSON object or array. The tool automatically infers TypeScript types from the structure: strings become `string`, numbers become `number`, objects become interfaces, arrays with consistent types become `Type[]`."},{"title":"Configure generation options","description":"Choose whether to use interface or type, decide on `readonly` properties, and pick naming conventions. For strict mode, enable additional validation flags in TypeScript's compiler settings."},{"title":"Handle nested structures","description":"Complex JSON with nested objects generates nested TypeScript interfaces. Each nested object gets its own interface, making the types reusable and easier to refactor."},{"title":"Copy and integrate","description":"Copy the generated TypeScript definitions into your project. Add them to a types file or at the top of your service file. Use the generated types for API responses, function parameters, and state management."}],"agentContract":{"toolId":"json-to-typescript","contractVersion":"2.0.0","remote_callable":true,"remote_mode":"dedicated_api","risk_class":"L","max_input_bytes":131072,"timeout_ms":2000,"supports_streaming":false,"preferred_surface":"dedicated_api","dedicated_api":{"baseUrl":"https://aidevhub.io/api/json-to-typescript/","openapiUrl":"https://aidevhub.io/api/openapi.yaml","endpoints":[{"method":"GET","path":"/api/json-to-typescript/","summary":"GET json-to-typescript"},{"method":"POST","path":"/api/json-to-typescript/","summary":"POST json-to-typescript"}],"riskClass":"L","inputMaxBytes":131072,"timeoutMs":2000},"runtime":{"endpoint":"/api/tools/run/","methods":["GET","POST"],"queryParams":[{"name":"toolId","required":true,"description":"Tool identifier"},{"name":"a","required":true,"description":"Primary input"}],"postBodyShape":{"toolId":"string","input":"{ a, b?, c?, mode? }"},"exampleGet":"https://aidevhub.io/api/tools/run/?toolId=json-to-typescript&a=...","policy":{"riskClass":"L","limit":60,"burst":20,"windowSec":60,"inputMaxBytes":131072,"timeoutMs":2000,"cacheTtlSec":0,"networkEnabled":false,"supportsStreaming":false}}},"relatedTools":[{"id":"openapi-to-typescript","name":"OpenAPI to TypeScript Generator","url":"/openapi-to-typescript/","category":"converter"},{"id":"json-to-go","name":"JSON to Go Struct","url":"/json-to-go/","category":"converter"},{"id":"json-to-python","name":"JSON to Python Dataclass","url":"/json-to-python/","category":"converter"},{"id":"color-converter","name":"Color Converter","url":"/color-converter/","category":"converter"},{"id":"yaml-json","name":"YAML ↔ JSON Converter","url":"/yaml-json/","category":"converter"},{"id":"toml-editor","name":"TOML Editor & Converter","url":"/toml-editor/","category":"converter"}]}}