TypeScript to JSON Schema Converter | Instant & Accurate

🧩 TypeScript to JSON Schema

Convert TypeScript interfaces/types to JSON Schema Draft-07 (with definitions).

📝 Input TypeScript:
📤 Output JSON Schema:
// JSON Schema will appear here...
💡 Example TypeScript Samples:
📄 Simple Interface + Union
Interface + type union literals
🔗 Nested + Arrays
Nested refs and arrays
🗂 Record + Date
Record and Date

Transform TypeScript Definitions into Valid JSON Schema

Manually writing JSON Schemas for your API validation can be tedious and prone to errors. Our TypeScript to JSON Schema tool automates this process, allowing you to paste your TypeScript code and receive a fully compliant JSON Schema in seconds. Whether you are using it for Ajv validation, OpenAPI documentation, or form generation, our tool ensures 100% accuracy.

Key Features

  • Support for Complex Types: Handles nested interfaces, enums, optional properties, and unions.

  • Instant Conversion: Real-time generation as you type or paste your code.

  • Draft-07 & Draft 2019-09 Compatible: Generates schemas compatible with the latest industry standards.

  • Zero Dependencies: No need to install heavy NPM packages locally for a quick conversion.

How to Use the Converter

  1. Paste your Code: Enter your TypeScript interface or type definitions into the input editor.

  2. Configure Options: (Optional) Choose your preferred JSON Schema draft version.

  3. Generate: Click the "Convert" button to process your code.

  4. Copy & Use: Copy the resulting JSON object directly into your project’s validation logic.

Why Convert TypeScript to JSON Schema?

TypeScript provides excellent type safety during development, but that safety disappears once the code is compiled to JavaScript and runs in production. JSON Schema fills this gap by providing runtime validation.

1. Runtime Data Validation

By converting your TS interfaces to JSON Schema, you can use libraries like Ajv to validate incoming API requests against your defined types, ensuring your application never processes malformed data.

2. Standardized Documentation

JSON Schema is the backbone of OpenAPI (Swagger). Converting your existing TypeScript models into schemas makes it easier to generate interactive API documentation that stays in sync with your codebase.

3. Automated Form Generation

Many frontend frameworks use JSON Schema to dynamically render forms (e.g., react-jsonschema-form). Converting your backend types directly to schemas saves hours of manual UI coding.

Frequently Asked Questions

Does it support TypeScript Enums?

Yes, the tool correctly maps TypeScript enum values to the enum keyword in JSON Schema, ensuring strict value matching.

Can it handle Utility Types?

Our converter supports common utility types like Partial<T>, Readonly<T>, and Pick<T, K>, allowing you to transform complex logic effortlessly.

Is my code secure?

Absolutely. The conversion happens entirely in your browser or via a secure, transient process. We do not store your source code or the generated schemas.

Pro Tips for Better Schemas

  • Use JSDoc Comments: Our tool can parse JSDoc tags like @minimum, @maxLength, and @pattern to add extra validation constraints to your JSON Schema.

  • Keep Interfaces Modular: Break down large interfaces into smaller, reusable types for cleaner schema outputs.