JSON to TypeScript
Paste JSON and instantly generate TypeScript interfaces.
JSON Input
TypeScript Output
About JSON to TypeScript
Manually writing TypeScript interfaces from JSON data is tedious and error-prone. This tool takes any JSON object or array and automatically generates accurate TypeScript interface definitions, inferring string, number, boolean, array, and nested object types from your actual data.
Paste a sample API response and get production-ready TypeScript types in seconds. The generator handles nested objects with properly named interfaces, optional fields, and array types. It saves significant time during API integration work.
The output follows TypeScript best practices and is ready to drop directly into your codebase.
Features
- ✓Automatic type inference from JSON values
- ✓Nested object support with separate interfaces
- ✓Array and union type detection
- ✓Optional field handling
- ✓Clean, readable interface naming
Common Use Cases
- →Generating types from REST API responses
- →Typing third-party JSON data schemas
- →Bootstrapping TypeScript projects with existing JSON configs
- →Converting OpenAPI example objects to interfaces