JSON → TypeScript
Generate TypeScript interfaces from JSON with nested types and arrays. Free, fast, and runs 100% in your browser.
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JSON → TypeScript Interface Generator
Paste JSON and get TypeScript interfaces with nested types and arrays.
About JSON → TypeScript
The ZamDev JSON to TypeScript converter automatically generates clean, properly typed TypeScript interfaces from any JSON data. Paste an API response, database record, or any JSON object and get a complete set of TypeScript interfaces with correct types for strings, numbers, booleans, arrays, and nested objects. Save hours of manual type definition and reduce type errors in your TypeScript projects.
How It Works
- 1Paste your JSON data into the input editor.
- 2The tool analyzes the JSON structure and infers TypeScript types.
- 3Nested objects automatically generate separate named interfaces.
- 4Array items are typed based on their content structure.
- 5Copy the generated TypeScript interfaces and paste into your project.
Key Features
Lightning Fast
Processes instantly with zero server delays
100% Private
Your data never leaves your device
No Sign-up Required
Use this tool instantly — completely free
Works Everywhere
Compatible with all modern browsers and devices
Common Use Cases
Generating types from REST API response JSON for frontend projects
Creating interfaces from database query results
Converting JSON configuration schemas to typed objects
Speeding up TypeScript project setup with auto-generated types
Ensuring type safety when consuming third-party API data
Creating DTO interfaces from backend JSON endpoints
Frequently Asked Questions
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