TypeScript to JSON Schema Converter

Transform TypeScript interfaces into JSON Schema instantly with our premium tool

✨ Premium Features 🚀 100% Free 🔒 Secure & Private ⚡ Real-time Conversion 🌐 No Sign-up Required
⚙️ Schema Options:
📝 TypeScript Input
📦 JSON Schema Output
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🎯 What is TypeScript to JSON Schema Conversion?

TypeScript to JSON Schema conversion is the process of transforming TypeScript type definitions, interfaces, and types into standard JSON Schema format. JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It's widely used for API validation, data validation, configuration files, and ensuring data consistency across systems.

Our premium TypeScript to JSON Schema converter provides an advanced, user-friendly interface to automatically generate JSON Schema from your TypeScript definitions. Whether you're building APIs, validating data structures, or documenting your data models, our tool streamlines the entire process with powerful features and instant results.

💡 Pro Tip: JSON Schema is the industry standard for validating JSON data structures. It's used by major companies and frameworks including OpenAPI (Swagger), AsyncAPI, Postman, and countless validation libraries across all programming languages.

Why Use Our Premium TypeScript to JSON Schema Converter?

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Lightning-Fast Conversion

Transform complex TypeScript interfaces into JSON Schema in milliseconds. Our optimized algorithm handles nested types, arrays, unions, and advanced TypeScript features instantly.

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Premium UI/UX

Enjoy a beautiful, modern interface with smooth animations, real-time feedback, and intuitive controls. Our premium design makes conversion a delightful experience.

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100% Private & Secure

All conversions happen locally in your browser. Your code never touches our servers, ensuring complete privacy and security for sensitive business logic.

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Advanced Configuration

Customize your JSON Schema output with options for required fields, additional properties, descriptions, examples, and more. Full control over schema generation.

Built-in Validation

Validate your generated JSON Schema to ensure it's compliant with the JSON Schema specification. Catch errors before using schemas in production.

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Fully Responsive

Works perfectly on desktop, tablet, and mobile devices. Convert schemas on the go with our mobile-optimized interface.

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Export & Download

Download generated schemas as JSON files with a single click. Perfect for integrating into your build pipeline or documentation.

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Works Offline

Once loaded, the converter works without internet connection. Perfect for air-gapped environments or working on flights.

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Real-time Statistics

View detailed statistics about your schemas including property count, lines, processing time, and file size.

📚 Complete Guide to TypeScript to JSON Schema Conversion

Step-by-Step Conversion Process

  1. Prepare Your TypeScript Interface: Start with well-defined TypeScript interfaces or types. Ensure your code is syntactically correct.
  2. Paste into the Editor: Copy your TypeScript definitions and paste them into the left editor panel.
  3. Configure Options: Select your preferred schema options like required fields, additional properties, and descriptions.
  4. Generate Schema: Click "Generate JSON Schema" to transform your TypeScript into JSON Schema format.
  5. Validate Output: Use the built-in validator to ensure your schema is compliant with JSON Schema specifications.
  6. Export or Copy: Download the schema as a JSON file or copy it to your clipboard for immediate use.

Understanding JSON Schema

JSON Schema is a powerful tool for validating the structure of JSON data. It provides a clear, human and machine-readable documentation of your data structures. JSON Schema is defined in JSON format itself and describes your data format including:

📘 TypeScript Advantages
  • Compile-time type checking
  • IDE autocomplete and IntelliSense
  • Refactoring support
  • Rich type system (unions, intersections, generics)
  • Perfect for application code
  • Better developer experience
📦 JSON Schema Advantages
  • Runtime validation
  • Language-agnostic
  • API documentation
  • Data validation across systems
  • Industry standard for APIs
  • Works with any JSON consumer

💡 Conversion Examples

Example 1: Simple Interface to JSON Schema

TypeScript Input
interface Product { id: number; name: string; price: number; inStock: boolean; description?: string; }
JSON Schema Output
{ "$schema": "http://json-schema.org/draft-07/schema#", "type": "object", "properties": { "id": { "type": "number", "description": "Product identifier" }, "name": { "type": "string", "description": "Product name" }, "price": { "type": "number", "description": "Product price" }, "inStock": { "type": "boolean", "description": "Product availability" }, "description": { "type": "string", "description": "Product description" } }, "required": ["id", "name", "price", "inStock"], "additionalProperties": false }

Example 2: Nested Objects and Arrays

TypeScript Input
interface Order { orderId: string; customer: { name: string; email: string; }; items: Array<{ productId: number; quantity: number; price: number; }>; totalAmount: number; status: 'pending' | 'processing' | 'completed'; }
JSON Schema Output
{ "$schema": "http://json-schema.org/draft-07/schema#", "type": "object", "properties": { "orderId": { "type": "string" }, "customer": { "type": "object", "properties": { "name": { "type": "string" }, "email": { "type": "string", "format": "email" } }, "required": ["name", "email"] }, "items": { "type": "array", "items": { "type": "object", "properties": { "productId": { "type": "number" }, "quantity": { "type": "number", "minimum": 1 }, "price": { "type": "number", "minimum": 0 } }, "required": ["productId", "quantity", "price"] } }, "totalAmount": { "type": "number", "minimum": 0 }, "status": { "type": "string", "enum": ["pending", "processing", "completed"] } }, "required": ["orderId", "customer", "items", "totalAmount", "status"] }

Example 3: Complex Types with Union and Enums

TypeScript Input
interface User { id: number; username: string; role: 'admin' | 'user' | 'moderator'; metadata: Record; preferences: { theme: 'light' | 'dark'; notifications: boolean; }; tags: string[]; }
JSON Schema Output
{ "$schema": "http://json-schema.org/draft-07/schema#", "type": "object", "properties": { "id": { "type": "number" }, "username": { "type": "string", "minLength": 3 }, "role": { "type": "string", "enum": ["admin", "user", "moderator"] }, "metadata": { "type": "object", "additionalProperties": true }, "preferences": { "type": "object", "properties": { "theme": { "type": "string", "enum": ["light", "dark"] }, "notifications": { "type": "boolean" } }, "required": ["theme", "notifications"] }, "tags": { "type": "array", "items": { "type": "string" } } }, "required": ["id", "username", "role", "metadata", "preferences", "tags"] }

🔧 Advanced Features and Use Cases

Supported TypeScript Features

Our converter intelligently handles a wide range of TypeScript features:

Common Use Cases

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API Development

Generate JSON Schema for API request/response validation. Perfect for OpenAPI (Swagger) documentation and runtime validation.

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Form Validation

Create schemas for frontend form validation libraries like React Hook Form, Formik, or react-jsonschema-form.

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Database Schemas

Document database models and validate data before persistence. Works great with MongoDB, PostgreSQL JSON columns, and more.

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Configuration Files

Validate JSON configuration files and provide autocomplete in IDEs that support JSON Schema.

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Data Migration

Ensure data consistency during migrations by validating transformed data against schemas.

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Documentation

Auto-generate comprehensive data structure documentation for technical specifications and API docs.

Integration with Popular Tools

JSON Schema works seamlessly with these popular tools and frameworks:

❓ Frequently Asked Questions

What is the difference between TypeScript types and JSON Schema?
TypeScript provides compile-time type checking for TypeScript/JavaScript code, while JSON Schema provides runtime validation for JSON data. TypeScript types are removed during compilation, but JSON Schema persists and can validate data from any source (APIs, user input, external systems). JSON Schema is also language-agnostic and works across different programming languages.
Is this TypeScript to JSON Schema converter completely free?
Yes! Our TypeScript to JSON Schema converter is 100% free with no limitations. You can convert unlimited interfaces, download schemas, and use all premium features without any registration, payment, or hidden fees. We believe in providing powerful tools accessible to all developers.
How secure is my code when using this converter?
Extremely secure! All conversion happens entirely in your browser using client-side JavaScript. Your TypeScript code never leaves your device, is never sent to any server, and is completely private. You can even use this tool offline once the page is loaded. Perfect for working with proprietary or sensitive code.
Can I use the generated JSON Schema in production?
Absolutely! The generated JSON Schema follows the official JSON Schema specification (draft-07) and is production-ready. Thousands of developers use our tool to generate schemas for their production APIs, databases, and validation systems. Always validate the output for your specific use case, but the schemas are designed to work out of the box.
What TypeScript features are supported?
Our converter supports most TypeScript features including interfaces, type aliases, primitive types, arrays, nested objects, optional properties, union types, literal types, enums, Record types, and more. Complex features like generics, conditional types, and mapped types are handled with best-effort conversion. See our examples section for specific supported patterns.
Can I customize the generated JSON Schema?
Yes! We provide several customization options including marking all fields as required, allowing additional properties, including descriptions, and adding example values. After generation, you can also manually edit the JSON Schema in the output panel to add custom validation rules, patterns, or any other JSON Schema features.
How do I validate data against the generated schema?
Use a JSON Schema validator library in your programming language. Popular options include Ajv for JavaScript/Node.js, jsonschema for Python, JSON Schema Validator for Java, and many others. These libraries take your schema and data as input and return validation results. Most frameworks also support JSON Schema validation natively.
Does this work with TypeScript 5.x and latest features?
Yes! Our converter is updated to support the latest TypeScript features. We regularly update the tool to handle new TypeScript syntax and features. If you encounter any issues with newer TypeScript features, please let us know so we can add support.
Can I convert multiple interfaces at once?
Currently, the converter processes one interface at a time for clarity and accuracy. However, you can paste multiple interfaces into the input, and the converter will extract and process the first complete interface it finds. For batch processing, simply convert each interface one at a time.
What JSON Schema version does this generate?
Our converter generates JSON Schema draft-07, which is widely supported and considered the stable standard. Draft-07 is compatible with most validation libraries and tools. If you need a different version, you can manually adjust the $schema property in the generated output.
Can I use this for GraphQL schema generation?
While this tool specifically generates JSON Schema, the output can be used as a reference for creating GraphQL schemas. Both describe data structures, though they use different syntax. For direct GraphQL conversion, you'd need a specialized TypeScript to GraphQL converter.
Is there a file size limit for conversion?
There's no hard limit, but very large files (>50,000 lines) may take longer to process depending on your device's performance. For optimal performance, we recommend converting interfaces individually or in smaller groups. The tool handles typical use cases (1-5000 lines) instantly.

🎓 Best Practices and Tips

Writing TypeScript for Better JSON Schema Output

JSON Schema Validation Best Practices

Common Pitfalls to Avoid

⚠️ Watch out for: TypeScript's any type converts to unrestricted schema, losing type safety. Optional properties in TypeScript don't automatically mean they can be null - be explicit about null values. Union types with complex objects may need manual refinement in the schema.

🚀 Why JSON Schema Matters in 2025

JSON Schema has become the de facto standard for data validation across the software industry. Major companies including Google, Microsoft, Amazon, and thousands of others rely on JSON Schema for critical systems. Here's why it's essential:

Industry Adoption and Standards

Benefits of Using JSON Schema

🔗 Related Tools and Resources

Complementary Development Tools

Enhance your development workflow with these related tools:

Learning Resources